def request(self, method, url, fields=None, headers=None, **urlopen_kw):
        """
        Make a request using :meth:`urlopen` with the appropriate encoding of
        ``fields`` based on the ``method`` used.

        This is a convenience method that requires the least amount of manual
        effort. It can be used in most situations, while still having the
        option to drop down to more specific methods when necessary, such as
        :meth:`request_encode_url`, :meth:`request_encode_body`,
        or even the lowest level :meth:`urlopen`.
        """
        method = method.upper()

        if self._encode_url_methods in method:
            return self.request_encode_url(method, url, fields=fields,
                                           headers=headers,
                                           **urlopen_kw)
        else:
            return self.request_encode_body(method, url, fields=fields,
                                            headers=headers,
                                            **urlopen_kw)
dataset/ETHPy150Open LarsMichelsen/pmatic/ccu_pkg/python/lib/python2.7/site-packages/requests/packages/urllib3/request.py/RequestMethods.request/swapped operands of `in`