TODO list for Python 3.11 support

[DanielNoord]

• Re-enable numpy as a test dependency once they provide wheels for 3.11 > See Enable 3.11 in the CI #1517
• Remove the if: ${{ always() }} line from the coverage CI jobs
• Handle PEP654 (Support catching multiple exceptions introduced in pep654 in python 3.11 pylint#7703) Add Trystar nodes from python 3.11 #2028
• FormattedValue.conversion is a required field (instead of optional). This was an error in the Python documentation which was addressed recently. https://docs.python.org/3.11/library/ast.html#ast.FormattedValue bpo-46289: Make conversion of FormattedValue not optional on ASDL python/cpython#30467 > Update FormattedValue.postinit and its brain #2029
• [Optional] We could add an enum for FormattedValue.conversion. The int values can be confusion on its own. > Decided not to.

[cdce8p]

Some recent AST changes:

• Add support for new TryStar node. Almost identical to the ast.Try node. We shouldn't use the old TryExcept / TryFinally structure though! It's probably better to look at Add Try node #1389
  https://docs.python.org/3.11/library/ast.html#ast.TryStar
  bpo-45292: [PEP-654] add except* python/cpython#29581
• FormattedValue.conversion is a required field (instead of optional). This was an error in the Python documentation which was addressed recently.
  https://docs.python.org/3.11/library/ast.html#ast.FormattedValue
  bpo-46289: Make conversion of FormattedValue not optional on ASDL python/cpython#30467
• [Optional] We could add an enum for FormattedValue.conversion. The int values can be confusion on its own.

[rkhwaja]

The wrapt dependency needs to be ">=1.14" for python 3.11. See changelog

[Pierre-Sassoulas]

@rkhwaja I think pip handle that, if pylint require wrapt >= 1.12 but python 3.11 require wrapt >= 1.14 then pip download >= 1.14. We should not change our lower bound, as we could imagine that wrapt >=1.14 is incompatible with python 3.7 and changing this would break pylint for python 3.7.

[rkhwaja]

You could add a dependency like "wrapt>=1.14,<2;python_version>='3.11'" and then both the old and the new python will work.

I don't know if you have other users than pylint but they would all just work too if you did it this way.

[Pierre-Sassoulas]

But is this required at all ? wrapt is the package that should handle the metadata about the pytho interpreters it supports and pip takes it into account.

[cdce8p]

But is this required at all ? wrapt is the package that should handle the metadata about the pytho interpreters it supports and pip takes it into account.

Took me a moment to understand the issue. wrap doesn't pin a max supported version (which is the recommendation). Thus pip will happily install 1.12 even on python 3.11 if the dependency resolution requires it. However, only 1.14 is compatible. The options

• Add wrapt>=1.14,<2;python_version>='3.11' like @rkhwaja suggested
• Or just bump the min requirement to 1.14. 1.14 is compatible with Python >=3.5 so that wouldn't be an issue.
• End-users can always add the wrapt>=1.14 constraint themselves. Although that won't fix existing environments.

[DanielNoord]

• Or just bump the min requirement to 1.14. 1.14 is compatible with Python >=3.5 so that wouldn't be an issue.

See #1745