--find-links equivalent

• I have searched the issues of this repo and believe that this is not a duplicate.
• I have searched the documentation and believe that my question is not covered.

Using:

• Python 3.7.3
• Poetry 1.0.0b1

Feature Request

Because the CPU version of PyTorch is not on PyPI, they recommend installing it this way:

pip install torch==1.2.0+cpu --find-links https://download.pytorch.org/whl/torch_stable.html

However, there is no way to do this with Poetry?

Pointing directly to the wheel:

poetry add https://download.pytorch.org/whl/cpu/torch-1.2.0%2Bcpu-cp36-cp36m-manylinux1_x86_64.whl

results in

Updating dependencies
Resolving dependencies... (2.0s)


Package operations: 1 install, 0 updates, 0 removals

  - Installing torch (1.2.0+cpu https://download.pytorch.org/whl/cpu/torch-1.2.0%2Bcpu-cp36-cp36m-manylinux1_x86_64.whl)

[EnvCommandError]
Command ['/home/simmler/.cache/pypoetry/virtualenvs/epss-WeFenOJ_-py3.7/bin/python', '-m', 'pip', 'install', '--no-deps', 'torch==1.2.0+cpu'] errored with the following return code 1, and output: 
Collecting torch==1.2.0+cpu
  Could not find a version that satisfies the requirement torch==1.2.0+cpu (from versions: 0.1.2, 0.1.2.post1, 0.1.2.post2, 0.4.1, 0.4.1.post2, 1.0.0, 1.0.1, 1.0.1.post2, 1.1.0, 1.2.0)
No matching distribution found for torch==1.2.0+cpu

And adding https://download.pytorch.org/whl/torch_stable.html as a repository to the pyproject.toml does not work, because it (the PyTorch wheel index page) is not PEP conform.

[Nathan-Furnal]

Hi! Is there any news on this issue?

[Korijn]

The same is true for the latest stable pytorch and torchvision packages.

The officially recommended way is

pip install torch==1.5.1+cpu torchvision==0.6.1+cpu -f https://download.pytorch.org/whl/torch_stable.html

but without an equivalent to the -f option in poetry we can only add the wheels manually.

But adding the wheels manually fails because the solver thinks (1.5.1) != (1.5.1+cpu url)

$ poetry add --platform linux https://download.pytorch.org/whl/cpu/torchvision-0.6.1%2Bcpu-cp38-cp38-linux_x86_64.whl https://download.pytorch.org/whl/cpu/torch-1.5.1%2Bcpu-cp38-cp38-linux_x86_64.whl
Skipping virtualenv creation, as specified in config file.

Updating dependencies
Resolving dependencies... (36.4s)

[SolverProblemError]
Because myproject depends on torchvision (0.6.1+cpu url) which depends on torch (1.5.1), torch is required.
So, because myproject depends on torch (1.5.1+cpu url), version solving failed.

Should we split this into a new issue separate from the -f issue, though?

And adding here, what’s the recommended way to install pytorch and torchvision with poetry now? If it’s not possible (other than going through some 3rd party index as described above) that would be quite unfortunate.

See https://github.com/python-poetry/poetry/issues/2543 for the separate issue

For what it’s worth, I don’t think poetry needs this --find-links feature. Rather, the pytorch team needs to adopt proper packaging practices…