{"action":"created","issue":{"url":"https://api.github.com/repos/sympy/sympy/issues/12907","repository_url":"https://api.github.com/repos/sympy/sympy","labels_url":"https://api.github.com/repos/sympy/sympy/issues/12907/labels{/name}","comments_url":"https://api.github.com/repos/sympy/sympy/issues/12907/comments","events_url":"https://api.github.com/repos/sympy/sympy/issues/12907/events","html_url":"https://github.com/sympy/sympy/issues/12907","id":241386799,"number":12907,"title":"init_printing in IPython crashes with the cache off","user":{"login":"asmeurer","id":71486,"avatar_url":"https://avatars0.githubusercontent.com/u/71486?v=3","gravatar_id":"","url":"https://api.github.com/users/asmeurer","html_url":"https://github.com/asmeurer","followers_url":"https://api.github.com/users/asmeurer/followers","following_url":"https://api.github.com/users/asmeurer/following{/other_user}","gists_url":"https://api.github.com/users/asmeurer/gists{/gist_id}","starred_url":"https://api.github.com/users/asmeurer/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/asmeurer/subscriptions","organizations_url":"https://api.github.com/users/asmeurer/orgs","repos_url":"https://api.github.com/users/asmeurer/repos","events_url":"https://api.github.com/users/asmeurer/events{/privacy}","received_events_url":"https://api.github.com/users/asmeurer/received_events","type":"User","site_admin":false},"labels":[{"id":84627398,"url":"https://api.github.com/repos/sympy/sympy/labels/core.cache","name":"core.cache","color":"0000FF","default":false}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":{"url":"https://api.github.com/repos/sympy/sympy/milestones/47","html_url":"https://github.com/sympy/sympy/milestone/47","labels_url":"https://api.github.com/repos/sympy/sympy/milestones/47/labels","id":2599361,"number":47,"title":"SymPy 1.2","description":"","creator":{"login":"asmeurer","id":71486,"avatar_url":"https://avatars0.githubusercontent.com/u/71486?v=3","gravatar_id":"","url":"https://api.github.com/users/asmeurer","html_url":"https://github.com/asmeurer","followers_url":"https://api.github.com/users/asmeurer/followers","following_url":"https://api.github.com/users/asmeurer/following{/other_user}","gists_url":"https://api.github.com/users/asmeurer/gists{/gist_id}","starred_url":"https://api.github.com/users/asmeurer/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/asmeurer/subscriptions","organizations_url":"https://api.github.com/users/asmeurer/orgs","repos_url":"https://api.github.com/users/asmeurer/repos","events_url":"https://api.github.com/users/asmeurer/events{/privacy}","received_events_url":"https://api.github.com/users/asmeurer/received_events","type":"User","site_admin":false},"open_issues":5,"closed_issues":0,"state":"open","created_at":"2017-06-22T20:55:45Z","updated_at":"2017-07-07T21:38:39Z","due_on":null,"closed_at":null},"comments":2,"created_at":"2017-07-07T21:36:59Z","updated_at":"2017-07-07T22:11:20Z","closed_at":null,"body":"(sorry for insanely long crash log)\r\n\r\n```py\r\n$ SYMPY_USE_CACHE=\"no\" ipython\r\nPython 3.5.3 | packaged by conda-forge | (default, Feb 10 2017, 07:09:50)\r\nType 'copyright', 'credits' or 'license' for more information\r\nIPython 6.1.0 -- An enhanced Interactive Python. Type '?' for help.\r\n\r\nIn [1]: import sympy\r\n\r\nIn [2]: sympy.init_printing()\r\n---------------------------------------------------------------------------\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'nonnegative'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'integer'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nKeyError                                  Traceback (most recent call last)\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    242         try:\r\n--> 243             return self._assumptions[fact]\r\n    244         except KeyError:\r\n\r\nKeyError: 'zero'\r\n\r\nDuring handling of the above exception, another exception occurred:\r\n\r\nRecursionError                            Traceback (most recent call last)\r\n<ipython-input-2-727ad83c5c02> in <module>()\r\n----> 1 sympy.init_printing()\r\n\r\n~/Documents/Python/sympy/sympy/sympy/interactive/printing.py in init_printing(pretty_print, order, use_unicode, use_latex, wrap_line, num_columns, no_global, ip, euler, forecolor, backcolor, fontsize, latex_mode, print_builtin, str_printer, pretty_printer, latex_printer, **settings)\r\n    432         _init_ipython_printing(ip, stringify_func, use_latex, euler,\r\n    433                                forecolor, backcolor, fontsize, latex_mode,\r\n--> 434                                print_builtin, latex_printer, **settings)\r\n    435     else:\r\n    436         _init_python_printing(stringify_func, **settings)\r\n\r\n~/Documents/Python/sympy/sympy/sympy/interactive/printing.py in _init_ipython_printing(ip, stringify_func, use_latex, euler, forecolor, backcolor, fontsize, latex_mode, print_builtin, latex_printer, **settings)\r\n    187         from sympy.core.basic import Basic\r\n    188         from sympy.matrices.matrices import MatrixBase\r\n--> 189         from sympy.physics.vector import Vector, Dyadic\r\n    190         from sympy.tensor.array import NDimArray\r\n    191\r\n\r\n~/Documents/Python/sympy/sympy/sympy/physics/__init__.py in <module>()\r\n      3 \"\"\"\r\n      4\r\n----> 5 from . import units\r\n      6 from .matrices import mgamma, msigma, minkowski_tensor, mdft\r\n\r\n~/Documents/Python/sympy/sympy/sympy/physics/units/__init__.py in <module>()\r\n     83 )\r\n     84\r\n---> 85 from .definitions import (\r\n     86     percent, percents,\r\n     87     permille,\r\n\r\n~/Documents/Python/sympy/sympy/sympy/physics/units/definitions.py in <module>()\r\n    164 # Planck units:\r\n    165 planck_mass = Quantity(\"planck_mass\", mass, sqrt(hbar*speed_of_light/G), \"m_P\")\r\n--> 166 planck_time = Quantity(\"planck_time\", time, sqrt(hbar*G/speed_of_light**5), \"t_P\")\r\n    167 planck_temperature = Quantity(\"planck_temperature\", temperature, sqrt(hbar*speed_of_light**5/G/boltzmann**2), \"T_P\")\r\n    168 planck_length = Quantity(\"planck_length\", length, sqrt(hbar*G/speed_of_light**3), \"l_P\")\r\n\r\n~/Documents/Python/sympy/sympy/sympy/functions/elementary/miscellaneous.py in sqrt(arg)\r\n    113     \"\"\"\r\n    114     # arg = sympify(arg) is handled by Pow\r\n--> 115     return Pow(arg, S.Half)\r\n    116\r\n    117\r\n\r\n~/Documents/Python/sympy/sympy/sympy/core/power.py in __new__(cls, b, e, evaluate)\r\n    225                             return S.Exp1**(c*numer(ex))\r\n    226\r\n--> 227                 obj = b._eval_power(e)\r\n    228                 if obj is not None:\r\n    229                     return obj\r\n\r\n~/Documents/Python/sympy/sympy/sympy/core/mul.py in _eval_power(b, e)\r\n    643\r\n    644         if e.is_Rational or e.is_Float:\r\n--> 645             return p._eval_expand_power_base()\r\n    646\r\n    647         return p\r\n\r\n~/Documents/Python/sympy/sympy/sympy/core/power.py in _eval_expand_power_base(self, **hints)\r\n    750             if polar is None:\r\n    751                 return fuzzy_bool(x.is_nonnegative)\r\n--> 752         sifted = sift(maybe_real, pred)\r\n    753         nonneg = sifted[True]\r\n    754         other += sifted[None]\r\n\r\n~/Documents/Python/sympy/sympy/sympy/utilities/iterables.py in sift(seq, keyfunc)\r\n    663     m = defaultdict(list)\r\n    664     for i in seq:\r\n--> 665         m[keyfunc(i)].append(i)\r\n    666     return m\r\n    667\r\n\r\n~/Documents/Python/sympy/sympy/sympy/core/power.py in pred(x)\r\n    749                 return True\r\n    750             if polar is None:\r\n--> 751                 return fuzzy_bool(x.is_nonnegative)\r\n    752         sifted = sift(maybe_real, pred)\r\n    753         nonneg = sifted[True]\r\n\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    245             if self._assumptions is self.default_assumptions:\r\n    246                 self._assumptions = self.default_assumptions.copy()\r\n--> 247             return _ask(fact, self)\r\n    248\r\n    249     getit.func_name = as_property(fact)\r\n\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in _ask(fact, obj)\r\n    300             continue\r\n    301         if pk in handler_map:\r\n--> 302             _ask(pk, obj)\r\n    303\r\n    304             # we might have found the value of fact\r\n\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in _ask(fact, obj)\r\n    288         pass\r\n    289     else:\r\n--> 290         a = evaluate(obj)\r\n    291         if a is not None:\r\n    292             assumptions.deduce_all_facts(((fact, a),))\r\n\r\n~/Documents/Python/sympy/sympy/sympy/core/power.py in _eval_is_prime(self)\r\n    551             return self.doit().is_prime\r\n    552\r\n--> 553         if self.is_integer and self.is_positive:\r\n    554             \"\"\"\r\n    555             a Power will be non-prime only if both base and exponent\r\n\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    245             if self._assumptions is self.default_assumptions:\r\n    246                 self._assumptions = self.default_assumptions.copy()\r\n--> 247             return _ask(fact, self)\r\n    248\r\n    249     getit.func_name = as_property(fact)\r\n\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in _ask(fact, obj)\r\n    300             continue\r\n    301         if pk in handler_map:\r\n--> 302             _ask(pk, obj)\r\n    303\r\n    304             # we might have found the value of fact\r\n\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in _ask(fact, obj)\r\n    300             continue\r\n    301         if pk in handler_map:\r\n--> 302             _ask(pk, obj)\r\n    303\r\n    304             # we might have found the value of fact\r\n\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in _ask(fact, obj)\r\n    288         pass\r\n    289     else:\r\n--> 290         a = evaluate(obj)\r\n    291         if a is not None:\r\n    292             assumptions.deduce_all_facts(((fact, a),))\r\n\r\n~/Documents/Python/sympy/sympy/sympy/core/power.py in _eval_is_algebraic(self)\r\n   1063\r\n   1064     def _eval_is_algebraic(self):\r\n-> 1065         if self.base.is_zero or (self.base - 1).is_zero:\r\n   1066             return True\r\n   1067         elif self.exp.is_rational:\r\n\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    245             if self._assumptions is self.default_assumptions:\r\n    246                 self._assumptions = self.default_assumptions.copy()\r\n--> 247             return _ask(fact, self)\r\n    248\r\n    249     getit.func_name = as_property(fact)\r\n\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in _ask(fact, obj)\r\n    288         pass\r\n    289     else:\r\n--> 290         a = evaluate(obj)\r\n    291         if a is not None:\r\n    292             assumptions.deduce_all_facts(((fact, a),))\r\n\r\n~/Documents/Python/sympy/sympy/sympy/core/add.py in _eval_is_zero(self)\r\n    540         if z == len(self.args):\r\n    541             return True\r\n--> 542         if self.func(*nz).is_zero:\r\n    543             if not im_or_z and not im:\r\n    544                 return True\r\n\r\n... last 3 frames repeated, from the frame below ...\r\n\r\n~/Documents/Python/sympy/sympy/sympy/core/assumptions.py in getit(self)\r\n    245             if self._assumptions is self.default_assumptions:\r\n    246                 self._assumptions = self.default_assumptions.copy()\r\n--> 247             return _ask(fact, self)\r\n    248\r\n    249     getit.func_name = as_property(fact)\r\n\r\nRecursionError: maximum recursion depth exceeded\r\n\r\nIn [3]:\r\n```"},"comment":{"url":"https://api.github.com/repos/sympy/sympy/issues/comments/313805044","html_url":"https://github.com/sympy/sympy/issues/12907#issuecomment-313805044","issue_url":"https://api.github.com/repos/sympy/sympy/issues/12907","id":313805044,"user":{"login":"asmeurer","id":71486,"avatar_url":"https://avatars0.githubusercontent.com/u/71486?v=3","gravatar_id":"","url":"https://api.github.com/users/asmeurer","html_url":"https://github.com/asmeurer","followers_url":"https://api.github.com/users/asmeurer/followers","following_url":"https://api.github.com/users/asmeurer/following{/other_user}","gists_url":"https://api.github.com/users/asmeurer/gists{/gist_id}","starred_url":"https://api.github.com/users/asmeurer/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/asmeurer/subscriptions","organizations_url":"https://api.github.com/users/asmeurer/orgs","repos_url":"https://api.github.com/users/asmeurer/repos","events_url":"https://api.github.com/users/asmeurer/events{/privacy}","received_events_url":"https://api.github.com/users/asmeurer/received_events","type":"User","site_admin":false},"created_at":"2017-07-07T22:11:19Z","updated_at":"2017-07-07T22:11:19Z","body":"Seems there are also a lot of test failures with the cache off. How on earth can we automatically test this (the tests take *forever* with the cache off)?"}}
{"actor":{"display_login":"asmeurer"}}