{"action":"opened","issue":{"url":"https://api.github.com/repos/dmlc/mxnet/issues/7052","repository_url":"https://api.github.com/repos/dmlc/mxnet","labels_url":"https://api.github.com/repos/dmlc/mxnet/issues/7052/labels{/name}","comments_url":"https://api.github.com/repos/dmlc/mxnet/issues/7052/comments","events_url":"https://api.github.com/repos/dmlc/mxnet/issues/7052/events","html_url":"https://github.com/dmlc/mxnet/issues/7052","id":243119658,"number":7052,"title":"C/C++ API: Get updated weights/args/params from Symbol?","user":{"login":"NiklasTreutner","id":27948844,"avatar_url":"https://avatars6.githubusercontent.com/u/27948844?v=4","gravatar_id":"","url":"https://api.github.com/users/NiklasTreutner","html_url":"https://github.com/NiklasTreutner","followers_url":"https://api.github.com/users/NiklasTreutner/followers","following_url":"https://api.github.com/users/NiklasTreutner/following{/other_user}","gists_url":"https://api.github.com/users/NiklasTreutner/gists{/gist_id}","starred_url":"https://api.github.com/users/NiklasTreutner/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/NiklasTreutner/subscriptions","organizations_url":"https://api.github.com/users/NiklasTreutner/orgs","repos_url":"https://api.github.com/users/NiklasTreutner/repos","events_url":"https://api.github.com/users/NiklasTreutner/events{/privacy}","received_events_url":"https://api.github.com/users/NiklasTreutner/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2017-07-14T21:42:24Z","updated_at":"2017-07-14T21:42:24Z","closed_at":null,"body":"Hi,\r\n\r\ni'd like to access the updated weights during training. Following the LeNet-example, if i just access the args_map i used to initialize the Net (e.g. args_map[\"conv1_w\"] ), the weights don't get updated from iteration to iteration (although training works and the output changes). that's probably because the actual symbol-bound weights on the gpu-context aren't synced to the weights that were used to initialize.\r\n\r\nHow can I \"download\" or update the current weights (along the lines of \"get_params\" for a model), if i only have the currently trained symbol?\r\n\r\nI'm not entirely sure if i completely understand all connections between NDArrays, Symbols and Models (e.g. how can i \"turn\" a trained stack/group of symbols into a model?), so i'd be thankful for all advice.\r\n\r\nThanks!"}}
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