Less restrictive python 3 dependency

[yajo]

Using this new version specifier is equivalent to >=3.6,<4.0.0, which allows other projects using this same specifier work with yours.

I have this in my project, and when trying to add the master commit from questionary, poetry fails (correctly) with:

  SolverProblemError

  The current project's Python requirement (>=3.6.1,<4.0.0) is not compatible with some of the required packages Python requirement:
    - questionary requires Python >=3.6,<3.9, so it will not be satisfied for Python >=3.9,<4.0.0

  Because copier depends on questionary (1.6.0 git rev text-custom-lexer) which requires Python >=3.6,<3.9, version solving failed.

  at ~/.local/pipx/venvs/poetry/lib64/python3.8/site-packages/poetry/puzzle/solver.py:241 in _solve
      237│             packages = result.packages
      238│         except OverrideNeeded as e:
      239│             return self.solve_in_compatibility_mode(e.overrides, use_latest=use_latest)
      240│         except SolveFailure as e:
    → 241│             raise SolverProblemError(e)
      242│
      243│         results = dict(
      244│             depth_first_search(
      245│                 PackageNode(self._package, packages), aggregate_package_nodes

  • Check your dependencies Python requirement: The Python requirement can be specified via the `python` or `markers` properties

    For questionary, a possible solution would be to set the `python` property to ">=3.6.1,<3.9"

    https://python-poetry.org/docs/dependency-specification/#python-restricted-dependencies,
    https://python-poetry.org/docs/dependency-specification/#using-environment-markers

Unless there's a strong reason to block python 3.9, I would advise to use this easier version specifier.

It's a matter of opinion of course, you're not forced to accept this.

[kiancross]

I think if we are supporting python 3.9 too we should add it to the CI matrix.

[yajo]

Yes, done.

Please could you label this as hacktoberfest-accepted? All my other PRs would help too. Thanks!

[layday]

The tests are failing because 3.9 is not available on GHA yet - you can track this issue. In meantime, you can test against 3.9.0rc1 or rc2 by doing something like this.

[yajo]

It seems they fixed it 10 minutes ago. Can you trigger a rebuild please?

[yajo]

@tmbo This is ✔️ and Python 3.9 was already released this month. Would you mind to merge please?

Also pretty please I need a new release with latest patches... Thanks!

[tmbo]

will do 👍

[tmbo]

@yajo released 1.7.0 just for you 😉