poetry export produces unresolvable requirements.txt

[Mchristos]

• I am on the latest Poetry version.

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

• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: Ubuntu 20.04 (WSL)

• Poetry version: 1.1.13

• Link of a Gist with the contents of your pyproject.toml file:
  pyproject.toml
  poetry.lock

Issue

Doing poetry export -f requirements.txt and installing dependencies in a fresh virtual environment from the resulting requirements, creates a situation where pip is unable to resolve the dependencies, due to conflicting version requirements among packages.

Specifically, I am doing the following (inside a docker build, I should add)

python -m venv /venv
poetry export -f requirements.txt | /venv/bin/pip install -r /dev/stdin

This yields the following ResolutionImpossible error from pip:

#9 335.2 ERROR: Cannot install -r /dev/stdin (line 62), -r /dev/stdin (line 843) and torch==1.10.2 because these package versions have conflicting dependencies.
#9 335.2 
#9 335.2 The conflict is caused by:
#9 335.2     The user requested torch==1.10.2
#9 335.2     fastai 2.5.3 depends on torch<1.11 and >=1.7.0
#9 335.2     torchvision 0.12.0 depends on torch==1.11.0
#9 335.2 
#9 335.2 To fix this you could try to:
#9 335.2 1. loosen the range of package versions you've specified
#9 335.2 2. remove package versions to allow pip attempt to solve the dependency conflict
#9 335.2 
#9 335.2 ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/topics/dependency-resolution/#dealing-with-dependency-conflicts
------

[finswimmer]

Hello @Mchristos,

please add your pyproject.toml and poetry.lock. Without them no one can try to reproduce your issue.

Thanks!

fin swimmer

[Mchristos]

Apologies, thought I had linked the pyproject gist. Both pyproject and lockfile are linked now:

https://gist.github.com/Mchristos/83b524d022be9bc561b75e68d39d7305

https://gist.github.com/Mchristos/62eea04e582790616f634ed3e48f5fb6

[dimbleby]

Your lockfile says:

[[package]]
name = "torchvision"
version = "0.12.0"
description = "image and video datasets and models for torch deep learning"
category = "main"
optional = false
python-versions = ">=3.7"

[package.dependencies]
numpy = "*"
pillow = ">=5.3.0,<8.3.0 || >=8.4.0"
requests = "*"
torch = "*"
typing-extensions = "*"

which is to say that poetry does not think that torchvision 0.12.0 depends on any particular version of torch, contrary to what pip says.

https://pypi.org/pypi/torchvision/0.12.0/json agrees with poetry, whereas the METADATA in the torchvision .whl agrees with pip.

Suggest raise an issue against torchvision asking them to publish consistent information to pypi.

[Mchristos]

Great, thanks for looking into it and giving feedback. Appreciate it!

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.