Some problems encountered in installing pytorch in windows11 CONDA

Project scenario ：

I did it again today anaconda, Put on miniconda（anaconda It's too big , Many useless bags occupy space , also pycharm Often index pkg The file of ）.

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Problem description 1

reinstall conda after , Then match Tsinghua source , Just want to put pytorch packed , according to pytorch Official website order , Copy and download , However, installation was not found torch The speed is still relatively slow .

conda install pytorch torchvision torchaudio cudatoolkit=11.3 -c pytorch

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Cause analysis ：

At the end of the command -c pytorch Need to get rid of it. , Otherwise, the command defaults to go pytorch Source , Still unable to use the speed of domestic sources .

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Solution ：

Just delete the ending .

conda install pytorch torchvision torchaudio cudatoolkit=11.3

Problem description 2

After configuration as required , Follow the command to download pytorch, Later, I encountered a problem ,PackagesNotFoundError: The following packages are not available from current channels:

Collecting package metadata (current_repodata.json): done
Solving environment: failed with initial frozen solve. Retrying with flexible solve.
Collecting package metadata (repodata.json): done
Solving environment: failed with initial frozen solve. Retrying with flexible solve.

PackagesNotFoundError: The following packages are not available from current channels:

  - torchvision
  - torchaudio

Current channels:

  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/win-64
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/noarch
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/r/win-64
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/r/noarch
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/msys2/win-64
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/msys2/noarch

To search for alternate channels that may provide the conda package you're
looking for, navigate to

    https://anaconda.org

and use the search bar at the top of the page.

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Cause analysis ：

pytorh Some dependent packages are not available in the current channel .

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Solution ：

stay .condarc Modify the file , hold pytorch Raise the priority

channels:
  - http://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/pytorch/win-64/#  hold pytorch Lift it up haha 
  - defaults
show_channel_urls: true
default_channels:
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/r
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/msys2
custom_channels:
  conda-forge: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud
  msys2: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud
  bioconda: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud
  menpo: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud
  pytorch: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud
  pytorch-lts: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud
  simpleitk: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud

Don't ctrl+c interrupt

In the installation to pytorch When this bag , And then install it to 99 When , It seems to have stopped and failed , It's not , After downloading the package , The compressed package must be decompressed , Then it has to be transmitted to the corresponding env Inside , So it takes more time , I looked as if it had failed twice before , Then interrupt , Lead to conda There is also a cache left , need conda clean --all Clean up and download again , Wasted a lot of time .