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gh-100098: [Enum] insist on actual tuples, no subclasses, for auto (GH-100099)

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When checking for auto() instances, only top-level usage is supported,
which means either alone or as part of a regular tuple. Other
containers, such as lists, dicts, or namedtuples, will not have auto()
transformed into a value.
(cherry picked from commit ded02ca54d)

Co-authored-by: Ethan Furman <ethan@stoneleaf.us>
This commit is contained in:
Miss Islington (bot) 2022-12-07 23:21:29 -08:00 • committed by GitHub
parent 846898e5ab
commit d4426c8295
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3 changed files with 17 additions and 1 deletions
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4
Lib/enum.py
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@ -430,7 +430,9 @@ class _EnumDict(dict):
if isinstance(value, auto):
single = True
value = (value, )
if isinstance(value, tuple):
if type(value) is tuple and any(isinstance(v, auto) for v in value):
# insist on an actual tuple, no subclasses, in keeping with only supporting
# top-level auto() usage (not contained in any other data structure)
auto_valued = []
for v in value:
if isinstance(v, auto):