[New-bugs-announce] [issue36541] Make lib2to3 grammar more closely match Python

[Tim Hatch]

New submission from Tim Hatch <tim at timhatch.com>:

The grammar in lib2to3 is out of date and can't parse `:=` nor `f(**not x)` from running on real code.  I've done a cursory `diff -uw Grammar/Grammar Lib/lib2to3/grammar.txt`, and would like to fix lib2to3 so we can merge into both fissix and blib2to3, to avoid further divergence of the forks.

I'm unsure if I need a separate bug per pull request, but need at least one to get started.

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components: 2to3 (2.x to 3.x conversion tool)
messages: 339522
nosy: georg.brandl, lukasz.langa, thatch
priority: normal
severity: normal
status: open
title: Make lib2to3 grammar more closely match Python
type: behavior
versions: Python 3.6, Python 3.7, Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue36541>
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