Install pytorch through pip to solve the problem that torch cannot be used in jupyter notebook (modulenotfoundererror:no module named 'Torch').

Installed at that time torch Try using the official website conda Method , A network error will be reported during each download , So through pip install , Install the installation package , adopt pip install torch-1.3.0+cu92-cp37-cp37m-win_amd64.whl and pip install torchvision install （ perhaps pip install torchvision-0.4.1+cu92-cp37-cp37m-win_amd64.whl）.
Attach download address torch and torchvision

After installation , Can be in python neutralization pycharm Use in pytorch, But in jupyter notebook But you can't use . Use times wrong ,ModuleNotFoundError：No module named ‘torch’


Discover by looking , adopt pip Installed torch be not in conda Environment , By entering conda list Check the installed packages and see if they are torch（ adopt pip The installed package should be installed in the local environment , and conda Is one of my own python Environmental Science , So there's no ）, Need to be in conda One more time , In my case , This method works .
The method is as follows ：
① Install the package locally , Website see above . Need to put in c/user/… Next , If it's not in the right place , The command line will give an error warning , Just change your position .

② Create a virtual environment such as pytorch, Then switch to the virtual environment , There are corresponding tutorials on the Internet . adopt pip install , stay anaconda prompt in , Input pip install torch-1.3.0+cu92-cp37-cp37m-win_amd64.whl and pip install torchvision install （ perhaps pip install torchvision-0.4.1+cu92-cp37-cp37m-win_amd64.whl）

③ After installation , Can be used in this virtual environment torch 了 , Then add the virtual environment to jupyter notebook It's OK in China .