- Problem: installation failed because of conflicts with six.
- How to fix: use pip3 instead of conda so that the package manager successfully install PyTorch and related modules.
What happen with conda install
% conda install pytorch torchvision torchaudio -c pytorch
Collecting package metadata (current_repodata.json): done
Solving environment: failed with initial frozen solve. Retrying with flexible solve.
Solving environment: failed with repodata from current_repodata.json, will retry with next repodata source.
Collecting package metadata (repodata.json): done
Solving environment: failed with initial frozen solve. Retrying with flexible solve.
Solving environment: /
Found conflicts! Looking for incompatible packages.
This can take several minutes. Press CTRL-C to abort.
failed
UnsatisfiableError: The following specifications were found to be incompatible with each other:
Output in format: Requested package -> Available versions
Package six conflicts for:
torchvision -> six
pytorch -> mkl-service[version='>=2,<3.0a0'] -> six
Package pytorch conflicts for:
pytorch
torchaudio -> pytorch[version='1.2.0|1.3.0|1.3.1|1.4.0|1.5.0|1.5.1|1.6.0|1.7.0|1.7.1|1.8.0|1.8.1|1.9.0']
torchvision -> pytorch[version='1.2.0|1.3.0|1.3.1|1.4.0|1.5.0|1.5.1|1.6.0|1.7.0|1.7.1|1.8.0|1.8.1|1.9.0|>=1.1.0|>=1.0.0|>=0.4|>=0.3|>=0.2|1.7.1.*|1.3.1.*']
What happen with pip3 install
% pip3 install torch torchvision torchaudio
Collecting torch
Downloading torch-1.9.0-cp39-none-macosx_10_9_x86_64.whl (127.9 MB)
|████████████████████████████████| 127.9 MB 1.8 MB/s
Collecting torchvision
Downloading torchvision-0.10.0-cp39-cp39-macosx_10_9_x86_64.whl (13.8 MB)
|████████████████████████████████| 13.8 MB 1.0 MB/s
Collecting torchaudio
Downloading torchaudio-0.9.0-cp39-cp39-macosx_10_9_x86_64.whl (1.5 MB)
|████████████████████████████████| 1.5 MB 1.5 MB/s
Collecting typing-extensions
Downloading typing_extensions-3.10.0.0-py3-none-any.whl (26 kB)
Requirement already satisfied: numpy in /SOMEWHERE/anaconda3/envs/py39/lib/python3.9/site-packages (from torchvision) (1.20.2)
Requirement already satisfied: pillow>=5.3.0 in /SOMEWHERE/anaconda3/envs/py39/lib/python3.9/site-packages (from torchvision) (8.2.0)
Installing collected packages: typing-extensions, torch, torchvision, torchaudio
Successfully installed torch-1.9.0 torchaudio-0.9.0 torchvision-0.10.0 typing-extensions-3.10.0.0
Result
% conda list | grep torch
torch 1.9.0 pypi_0 pypi
torchaudio 0.9.0 pypi_0 pypi
torchvision 0.10.0 pypi_0 pypi
