pytorch installation error

纠正

安装pytorch

The first thing to do is to create a virtual environment：conda activate pytorch

从（base）->(pytorch)

 

结果出现错误

Solving environment: failed

CondaHTTPError: HTTP 000 CONNECTION FAILED for url <https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge/noarch/repodata.json>

Elapsed: -

An HTTP error occurred when trying to retrieve this URL.

HTTP errors are often intermittent, and a simple retry will get you on your way.

SSLError(MaxRetryError('HTTPSConnectionPool(host=\'mirrors.tuna.tsinghua.edu.cn\', port=443): Max retries exceeded with url: /anaconda/cloud/conda-forge/noarch/repodata.json (Caused by SSLError(SSLError("bad handshake: Error([(\'SSL routines\', \'ssl3_get_server_certificate\', \'certificate verify failed\')])")))'))

Because of normal installationpytorchis to be added later-c pytorch 的,But I originally wanted to use Tsinghuayuan here

这里输入

conda config --set show_channel_urls yes让condaTell us which mirror source to use when downloading

之后输入conda install pytorch torchvision torchaudio cudatoolkit=11.3  -c pytorch开始安装,The result is an error

 

原因可能是：Tsinghua source is wrong,找到C:\Users\Administrator文件下的.condarcThe file will be changed to ：

channels:
  - defaults
show_channel_urls: true
default_channels:
  - http://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main
  - http://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/r
  - http://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/msys2
custom_channels:
  conda-forge: http://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud
  msys2: http://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud
  bioconda: http://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud
  menpo: http://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud
  pytorch: http://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud
  simpleitk: http://mirr

输入：conda config --add channels conda-forge

之后再在Anaconda prompt中输入conda install pytorch torchvision torchaudio cudatoolkit=11.3  -c pytorch  就安装成功了,

判断是否安装成功

输入pip list  出现

 

或者输入python,之后输入import torch If no error is reported, the installation is successful