New submission from Serhiy Storchaka <storchaka+cpyt...@gmail.com>:
AST unparsing of infinity numbers produces a string which can't be evaluated
because inf and infj are not builtins.
>>> from __future__ import annotations
>>> def f(x: A[1e1000, 1e1000j]): pass
...
>>> f.__annotations__
{'x': 'A[(inf, infj)]'}
See how this problem is handled in Tools/parser/unparse.py.
There is similar problem with NaN. NaN can't be a result of parsing Python
sources, but it can be injected manually in AST, and it can be a result of
third-party AST optimizer.
----------
components: Interpreter Core
messages: 312492
nosy: gvanrossum, lukasz.langa, serhiy.storchaka
priority: normal
severity: normal
status: open
title: AST unparsing of infinity numbers
type: behavior
versions: Python 3.7, Python 3.8
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue32894>
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