Poetry 1.1.8 can't update to preview misdetecting python 2

[staticdev]

• 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: Debian 11

• Poetry version: 1.1.8

• Link of a Gist with the contents of your pyproject.toml file: no project.toml

Issue

I installed poetry with install-poetry.py in a fresh installed Debian that comes with Python 3.9.

I execute on 1.1.8 the command:
poetry self update --preview

If doesn't work, but if I python install-poetry.py --uninstall and python install-poetry.py --preview, it works.

-vvv option gives the following output:

Updating Poetry to 1.2.0a2

Updating dependencies
Resolving dependencies...
   1: fact: poetry-updater is 0.0.0
   1: derived: poetry-updater
   1: fact: poetry-updater depends on poetry (1.2.0a2)
   1: selecting poetry-updater (0.0.0)
   1: derived: poetry (==1.2.0a2)
   1: fact: poetry (1.2.0a2) requires Python >=3.6,<4.0
   1: conflict: poetry (1.2.0a2) requires Python >=3.6,<4.0
   1: !  poetry (1.2.0a2) is satisfied by  poetry (1.2.0a2)
   1: ! which is caused by "poetry-updater depends on poetry (1.2.0a2)"
   1: ! thus: version solving failed
   1: Version solving took 0.007 seconds.
   1: Tried 1 solutions.

  Stack trace:

  10  ~/.local/share/pypoetry/venv/lib/python3.9/site-packages/clikit/console_application.py:131 in run
       129│             parsed_args = resolved_command.args
       130│ 
     → 131│             status_code = command.handle(parsed_args, io)
       132│         except KeyboardInterrupt:
       133│             status_code = 1

   9  ~/.local/share/pypoetry/venv/lib/python3.9/site-packages/clikit/api/command/command.py:120 in handle
       118│     def handle(self, args, io):  # type: (Args, IO) -> int
       119│         try:
     → 120│             status_code = self._do_handle(args, io)
       121│         except KeyboardInterrupt:
       122│             if io.is_debug():

   8  ~/.local/share/pypoetry/venv/lib/python3.9/site-packages/clikit/api/command/command.py:171 in _do_handle
       169│         handler_method = self._config.handler_method
       170│ 
     → 171│         return getattr(handler, handler_method)(args, io, self)
       172│ 
       173│     def __repr__(self):  # type: () -> str

   7  ~/.local/share/pypoetry/venv/lib/python3.9/site-packages/cleo/commands/command.py:92 in wrap_handle
        90│         self._command = command
        91│ 
     →  92│         return self.handle()
        93│ 
        94│     def handle(self):  # type: () -> Optional[int]

   6  ~/.local/share/pypoetry/venv/lib/python3.9/site-packages/poetry/console/commands/self/update.py:195 in handle
       193│ 
       194│         if new_update_method:
     → 195│             return self.update_with_new_method(release.version)
       196│ 
       197│         self.update(release)

   5  ~/.local/share/pypoetry/venv/lib/python3.9/site-packages/poetry/console/commands/self/update.py:239 in update_with_new_method
       237│         self.line("")
       238│ 
     → 239│         self._update_with_new_method(version)
       240│         self._make_bin()
       241│ 

   4  ~/.local/share/pypoetry/venv/lib/python3.9/site-packages/poetry/console/commands/self/update.py:343 in _update_with_new_method
       341│         )
       342│         installer.update(True)
     → 343│         installer.run()
       344│ 
       345│     def _make_bin(self):

   3  ~/.local/share/pypoetry/venv/lib/python3.9/site-packages/poetry/installation/installer.py:103 in run
       101│         local_repo = Repository()
       102│ 
     → 103│         return self._do_install(local_repo)
       104│ 
       105│     def dry_run(self, dry_run=True):  # type: (bool) -> Installer

   2  ~/.local/share/pypoetry/venv/lib/python3.9/site-packages/poetry/installation/installer.py:235 in _do_install
       233│             )
       234│ 
     → 235│             ops = solver.solve(use_latest=self._whitelist)
       236│         else:
       237│             self._io.write_line("Installing dependencies from lock file")

   1  ~/.local/share/pypoetry/venv/lib/python3.9/site-packages/poetry/puzzle/solver.py:65 in solve
        63│         with self._provider.progress():
        64│             start = time.time()
     →  65│             packages, depths = self._solve(use_latest=use_latest)
        66│             end = time.time()
        67│ 

  SolverProblemError

  The current project's Python requirement (2.7.18) is not compatible with some of the required packages Python requirement:
    - poetry requires Python >=3.6,<4.0, so it will not be satisfied for Python 2.7.18
  
  Because poetry-updater depends on poetry (1.2.0a2) which requires Python >=3.6,<4.0, version solving failed.

  at ~/.local/share/pypoetry/venv/lib/python3.9/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 poetry, a possible solution would be to set the `python` property to "<empty>"

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

[finswimmer]

Hello @staticdev,

you haven't come back to this issue for a long while. So I assume this is solved in the meantime and I can close this ticket.

Feel free to leave a comment if you disagree.

fin swimmer

[github-actions]

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