poetry: Ubuntu 22.04, Python 3.10, and broken virtual environment layouts

  • 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 Jammy

  • Poetry version: 1.2.0

  • Link of a Gist with the contents of your pyproject.toml file: https://gist.github.com/colindean/27d36dcc7cf78f722f374ebd5bfd970f (also contains log output and a brief description of env setup steps)

Issue

root@80d0e404badc:/what# poetry self add poetry-plugin-bundle
Using version ^1.0.0 for poetry-plugin-bundle

Updating dependencies
Resolving dependencies... (3.8s)

[Errno 2] No such file or directory: 'python'

I believe the problem is in here:

https://github.com/python-poetry/poetry/blob/f1af3f8eec26112b7271c4d3c602957d08cff3a9/src/poetry/utils/env.py#L1231-L1248

Ubuntu doesn’t provide a python command anymore, just python3:

root@80d0e404badc:/what# python --version
bash: python: command not found
root@80d0e404badc:/what# python3 --version
Python 3.10.4

Seeing as though all supported versions of Python on which Poetry runs should also provide a python3 executable, perhaps the fallback here should be python3?

https://github.com/python-poetry/poetry/blob/f1af3f8eec26112b7271c4d3c602957d08cff3a9/src/poetry/utils/env.py#L1178

About this issue

  • Original URL
  • State: open
  • Created 2 years ago
  • Reactions: 4
  • Comments: 20 (15 by maintainers)

Commits related to this issue

Most upvoted comments

I found that installing Debian’s python3-poetry results in a perfectly working Poetry. Looking at https://sources.debian.org/src/poetry/1.3.2%2Bdfsg-3/debian/patches/ I don’t believe this is because they’ve patched Poetry themselves.

+2
yrro on Feb 9, 2023

I also ran into this problem and didn’t know about the DEB_PYTHON_INSTALL_LAYOUT=deb workaround so will try that now. On my digging I may have found some more useful information as I too thought it was a problem with the way poetry handles the system python but the trace suggests otherwise.

The first “poetry error” (by which I don’t mean that poetry is doing anything wrong) in the trace comes from the env_manager.create_venv() command which, as the name suggests, creates a new venv using python3-venv. When I have a look at this new venv it contains <venv_path>/share and <venv_path>/lib but no <venv_path>/bin which should contain the python executables as well as the python symlink.

This seems very weird because when I create the venv myself the bin directory does exist so I’m not sure what’s happening internally for this bin directory to not get made.

Like I say I hope this is helpful to others and helps any debugging/patching effort either here or in Ubuntu upstream. Will try the environment variable setup now

+2
AdamWRichardson on Jan 5, 2023

You should ideally set it before ever installing Poetry – however, I am reasonably sure that setting it during env creation (e.g. poetry env use, poetry add without an existing env, etc) and during subsequent poetry install/poetry add/poetry update) should be sufficient. I do not work regularly with a Ubuntu/Debian distro, so I am guessing to an extent (I just export it in .bashrc when it comes up).

+2
neersighted on Oct 10, 2022

N.b. I hadn’t even run poetry install yet and just now went I did…

root@80d0e404badc:/what# poetry install
Creating virtualenv what--AkdOZe_-py3.10 in /root/.cache/pypoetry/virtualenvs

[Errno 2] No such file or directory: 'python'
+1
colindean on Sep 2, 2022
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