[issue36541] Make lib2to3 grammar better match Python, support the := walrus

[Batuhan Taskaya]

Batuhan Taskaya <isidentical at gmail.com> added the comment:

> Parsing support for `f(**mapping)` support is indeed still missing.
>
> as lib2to3 is pending deprecation at this point, i'm not going to work on this.  anyone is welcome to pick it up.  modifying the lib2to3 grammar, and any related code, and adding a test is what's needed to parse that syntax.

I'd also agree, and not supporting to add features from now on. If someone really needs this to be added [and backported], please re-open the issue.

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resolution:  -> out of date
stage: needs patch -> resolved
status: open -> closed

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<https://bugs.python.org/issue36541>
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