pytorch cuda安装报错的解决方法

conda install pytorch torchvision torchaudio pytorch-cuda=11.7 -c pytorch -c nvidia

conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
conda config --add channels Https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/
conda config --set show_channel_urls yes
conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/pytorch/win-64/

conda install pytorch torchvision torchaudio pytorch-cuda=11.7

Found conflicts! Looking for incompatible packages.
This can take several minutes.  Press CTRL-C to abort.
Examining torchaudio:  43%|██████████████████████████████████████████████▎                                                             | 3/7 [00:22<00:24,  6.10s/it]/failed                                                                                                                                                                

UnsatisfiableError: The following specifications were found
to be incompatible with the existing python installation in your environment:

Specifications:

  - torchaudio -> Python[version='2.7.*|3.5.*|3.6.*|>=2.7,<2.8.0a0|>=3.5,<3.6.0a0|3.4.*']

Your python: python=3.7

If python is on the left-most side of the chain, that's the version you've asked for.
When python appears to the right, that indicates that the thing on the left is somehow
not available for the python version you are constrained to. Note that conda will not
change your python version to a different minor version unless you explicitly specify
that.

The following specifications were found to be incompatible with each other:

Output in fORMat: Requested package -> Available versions

Package typing conflicts for:
torchvision -> typing_extensions -> typing[version='>=3.7.4']
pytorch -> typing_extensions -> typing[version='>=3.7.4']

Package pytorch conflicts for:
torchaudio -> pytorch[version='1.10.0|1.10.1|1.10.2|1.11.0|1.12.0|1.12.1|1.13.0|1.9.1|1.9.0|1.8.1|1.8.0|1.7.1|1.7.0|1.6.0']
torchvision -> pytorch[version='1.10.0|1.10.1|1.10.2|1.11.0|1.12.0|1.12.1|1.13.0|1.9.1|1.9.0|1.8.1|1.8.0|1.7.1|1.7.0|1.6.0|1.5.1|1.5.0|1.4.0|1.3.1|1.3.0|1.2.0|>=1.1.0|>=1.0.0|>=0.4']

Package pytorch-cuda conflicts for:
pytorch -> pytorch-cuda[version='>=11.6,<11.7|>=11.7,<11.8']
torchaudio -> pytorch-cuda[version='11.6.*|11.7.*']
torchvision -> pytorch==1.13.0 -> pytorch-cuda[version='>=11.6,<11.7|>=11.7,<11.8']
torchaudio -> pytorch==1.13.0 -> pytorch-cuda[version='>=11.6,<11.7|>=11.7,<11.8']
torchvision -> pytorch-cuda[version='11.6.*|11.7.*']

Package requests conflicts for:
python=3.7 -> pip -> requests
torchvision -> request

conda install pytorch torchvision torchaudio cudatoolkit=11.3

conda install pytorch torchvision torchaudio cudatoolkit=11.7

PackagesNotFoundError: The following packages are not available from current channels:
  - cudatoolkit=11.7

 conda install pytorch torchvision torchaudio pytorch-cuda=11.7 -c nvidia  

import torch

use_gpu = torch.cuda.is_available()
print(use_gpu)
print("devices count:", torch.cuda.device_count())