Poetry proceeds although python version is incorrect

[cfra]

General info

• OS version and name: Arch Linux
• Poetry version: 1.1.13

pyproject.toml

[tool.poetry]
name = "my-project"
version = "0.1.0"
description = ""
authors = ["Your Name <[email protected]>"]

[tool.poetry.dependencies]
python = ">=3.8,<3.10"
hcloud = "^1.10.0"

[tool.poetry.dev-dependencies]

[build-system]
requires = ["poetry-core>=1.0.0"]
build-backend = "poetry.core.masonry.api"

Issue

While system Python is 3.10, I have Python 3.9 available and active using pyenv.

Poetry correctly detects that the system Python version is incompatible with the Project and prints that it will use version 3.9, however the venv is created with the wrong python version:

$ cat .python-version
3.9.10
$ python
Python 3.9.10 (main, Feb  1 2022, 12:54:42)
[GCC 11.1.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>
$ which python
/home/user/.pyenv/shims/python
$ /usr/bin/python
Python 3.10.2 (main, Jan 15 2022, 19:56:27) [GCC 11.1.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>
$ poetry install # Poetry is 1.1.13
The currently activated Python version 3.10.2 is not supported by the project (>=3.8,<3.10).
Trying to find and use a compatible version.
Using python3 (3.9.10)
Creating virtualenv my-project-SwvjWCYu-py3.9 in /home/user/.cache/pypoetry/virtualenvs
Installing dependencies from lock file

  SolverProblemError

  The current project's Python requirement (3.10.2) is not compatible with some of the required packages Python requirement:
    - hcloud requires Python >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <3.10, so it will not be satisfied for Python 3.10.2
# install fails
$ . /home/user/.cache/pypoetry/virtualenvs/my-project-SwvjWCYu-py3.9/bin/activate
(my-project-SwvjWCYu-py3.9) $ python
Python 3.10.2 (main, Jan 15 2022, 19:56:27) [GCC 11.1.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>

Recreating the venv with the correct python version seems to resolve this problem:

$ rm -rf /home/user/.cache/pypoetry/virtualenvs/my-project-SwvjWCYu-py3.9
$ python -m venv /home/user/.cache/pypoetry/virtualenvs/my-project-SwvjWCYu-py3.9
$ poetry install
The currently activated Python version 3.10.2 is not supported by the project (>=3.8,<3.10).
Trying to find and use a compatible version.«
Using python3 (3.9.10)
Installing dependencies from lock file

Package operations: 65 installs, 0 updates, 0 removals

# install succeeds fine

Although this seems somewhat related to #5252, it seems to me like this is indeed a slightly different bug:

If Poetry detects that 3.9 is required and creates a venv called 3.9, that venv should not be running 3.10.

[finswimmer]

Hello @cfra,

I think you are affected by #5077 (comment) which is resolved by #5086.

fin swimmer

[cfra]

Yes, it sounds indeed like this is the case. Thank you for your prompt reply and keep up the great work. 👍

[github-actions]

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