poetry: PyQt5 install failing via Poetry [NEW BUG]

• Poetry version: 1.6.1
• Python version: 3.11.1
• OS version and name: Ubuntu 22.04
• pyproject.toml: N/A

• [ x] I am on the latest stable Poetry version, installed using a recommended method.
• [x ] I have searched the issues of this repo and believe that this is not a duplicate.
• [ x] I have consulted the FAQ and blog for any relevant entries or release notes.
• [x ] If an exception occurs when executing a command, I executed it again in debug mode (-vvv option) and have included the output below.

Issue

This morning Riverbank pushed out a new version of pyqt5 (5.15.10) and pyqt5-qt5 (5.15.11) to pypi and it seems to have messed things up with poetry dependency resolution. But basically now the situation is no matter if you try to install pyqt5 5.15.9 (most recent version till today) or 5.15.10, poetry considers that this depends strictly upon pyqt5-qt5 3.15.11, but yet it doesn’t seem to exist right now from poetry’s point of view. Specifically the error is:

 Unable to find installation candidates for pyqt5-qt5 (5.15.11)

  at ~/.local/share/pypoetry/venv/lib/python3.10/site-packages/poetry/installation/chooser.py:73 in choose_for
       69│ 
       70│             links.append(link)
       71│ 
       72│         if not links:
    →  73│             raise RuntimeError(f"Unable to find installation candidates for {package}")
       74│ 
       75│         # Get the best link
       76│         chosen = max(links, key=lambda link: self._sort_key(package, link))

It is clearly on pypi though: https://pypi.org/project/PyQt5-Qt5/#history

I have created a minimal script that you should be able to reproduce this with on any linux system w/ poetry installed (pyenv helps if you want to match my exact config), so long as the issue doesn’t fix itself due to things automatically updating (which I’m hoping for):

#!/bin/bash
tmp_dir=$(mktemp -d -t poetry_issue-XXXX)
cd "$tmp_dir"

if command -v pyenv &> /dev/null; then
    pyenv install 3.11.1
    pyenv local 3.11.1
    poetry init --no-interaction --python 3.11.1
else
    poetry init --no-interaction --python $(python -V 2>&1 | awk '{print $2}')
fi

# Poetry
{
    poetry -vvv add pyqt5==5.15.9 2>&1
    poetry -vvv install 2>&1
} > poetry_traceback.txt

# Pip
python -m venv traditional_venv
source traditional_venv/bin/activate

{
    python -m pip install PyQt5==5.15.9 -v 2>&1
} > pip_output.txt

deactivate

# Cleanup
rm .python-version
cd -
mv "$tmp_dir/poetry_traceback.txt" ./poetry_traceback.txt
mv "$tmp_dir/pip_output.txt" ./pip_output.txt
mv "$tmp_dir/poetry.lock" ./poetry.lock
rm -rf "$tmp_dir"

Pip was able to install it, but it doesn’t seem to try to install 5.15.11 and instead uses 5.15.2. Therefore, there may be an issue with Riverbank for having uploaded a bad version, but we should still be able to fallback to 5.15.2 as pip does.

Outputs of the poetry and pip (note that the pip install is succesful):

Poetry add/install output for pyqt5 3.15.9: https://gist.github.com/jordantgh/78dd541597048e89dda16647431f2268 Pip install output for the same: https://gist.github.com/jordantgh/f8fb87bc348fe3cb5237f2d819f2135f