How are we supposed to know the syntax of python-requires in pyproject.toml?

[metaperl]

I got the following error trace:

C:\programming\ogs-buddy\bin>pdm add auto-selenium
Adding packages to default dependencies: auto-selenium
  Lock failed
Unable to find a resolution because the following dependencies don't work on all Python versions defined by the
project's `requires-python`: .
  python>=3.6 (from <Candidate auto-selenium 1.0.0 from https://pypi.org/simple/auto-selenium/>)
  python>=3.6 (from <Candidate auto-selenium 1.0.1 from https://pypi.org/simple/auto-selenium/>)
To fix this, you can change the value of `requires-python` in pyproject.toml.
See C:\Users\thequ\AppData\Local\Temp\pdm-lock-qjw3jp5d.log for detailed debug log.
[ResolutionImpossible]: Unable to find a resolution
Add '-v' to see the detailed traceback

but then did not know the syntax for python-requires in pyproject.toml.

Also searching at fming doesnt help either.

[pawamoy]

There's a bit of info here: https://pdm.fming.dev/latest/usage/project/#how-requires-python-controls-the-project

PDM respects the value of requires-python in the way that it tries to pick package candidates that can work on all python versions that requires-python contains. For example, if requires-python is >=2.7, PDM will try to find the latest version of foo, whose requires-python version range is a superset of >=2.7.
So, make sure you write requires-python properly if you don't want any outdated packages to be locked.

What python-requires do you have in pyproject.toml?