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[Enum] attributes of mixed-in classes can be shadowed by other members #103596

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ethanfurman opened this issue Apr 17, 2023 · 1 comment
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[Enum] attributes of mixed-in classes can be shadowed by other members #103596

ethanfurman opened this issue Apr 17, 2023 · 1 comment
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@ethanfurman
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3.7 (EOL) end of life 3.8 (EOL) end of life 3.9 only security fixes 3.10 only security fixes 3.11 only security fixes 3.12 bugs and security fixes stdlib Python modules in the Lib dir type-bug An unexpected behavior, bug, or error

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@ethanfurman
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ethanfurman commented Apr 17, 2023 •
edited by bedevere-bot
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As mentioned in #101273 , when mixing data types into an enum, the data type's methods can be lost:

from enum import StrEnum, auto

class Book(StrEnum):
    author = auto()
    title = auto()
    isbn = auto()

Book.author
# <Book.author: 'author'>

Book.author.title()
# book object not callable exception, but 'Author' is expected

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@ethanfurman ethanfurman added type-bug An unexpected behavior, bug, or error stdlib Python modules in the Lib dir 3.11 only security fixes 3.10 only security fixes 3.9 only security fixes 3.8 (EOL) end of life 3.7 (EOL) end of life 3.12 bugs and security fixes labels Apr 17, 2023
@ethanfurman ethanfurman self-assigned this Apr 17, 2023
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This is a long-standing issue, so not going to backport any fix.

@ethanfurman ethanfurman mentioned this issue Apr 17, 2023
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@bedevere-bot bedevere-bot mentioned this issue Apr 17, 2023
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@ethanfurman ethanfurman mentioned this issue Apr 17, 2023
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ethanfurman added a commit that referenced this issue Apr 18, 2023
@ethanfurman @samypr100
gh-103596: [Enum] do not shadow mixed-in methods/attributes (GH-103600)
700ec65 
For example:

    class Book(StrEnum):
        title = auto()
        author = auto()
        desc = auto()

    Book.author.desc is Book.desc

but

    Book.author.title() == 'Author'

is commonly expected.  Using upper-case member names avoids this confusion and possible performance impacts.

Co-authored-by: samypr100 <3933065+samypr100@users.noreply.github.com>
carljm added a commit to carljm/cpython that referenced this issue Apr 20, 2023
@carljm
Merge branch 'main' into superopt
5c0a21c 
* main: (24 commits)
  pythongh-98040: Move the Single-Phase Init Tests Out of test_imp (pythongh-102561)
  pythongh-83861: Fix datetime.astimezone() method (pythonGH-101545)
  pythongh-102856: Clean some of the PEP 701 tokenizer implementation (python#103634)
  pythongh-102856: Skip test_mismatched_parens in WASI builds (python#103633)
  pythongh-102856: Initial implementation of PEP 701 (python#102855)
  pythongh-103583: Add ref. dependency between multibytecodec modules (python#103589)
  pythongh-83004: Harden msvcrt further (python#103420)
  pythonGH-88342: clarify that `asyncio.as_completed` accepts generators yielding tasks (python#103626)
  pythongh-102778: IDLE - make sys.last_exc available in Shell after traceback (python#103314)
  pythongh-103582: Remove last references to `argparse.REMAINDER` from docs (python#103586)
  pythongh-103583: Always pass multibyte codec structs as const (python#103588)
  pythongh-103617: Fix compiler warning in _iomodule.c (python#103618)
  pythongh-103596: [Enum] do not shadow mixed-in methods/attributes (pythonGH-103600)
  pythonGH-100530: Change the error message for non-class class patterns (pythonGH-103576)
  pythongh-95299: Remove lingering setuptools reference in installer scripts (pythonGH-103613)
  [Doc] Fix a typo in optparse.rst (python#103504)
  pythongh-101100: Fix broken reference `__format__` in `string.rst` (python#103531)
  pythongh-95299: Stop installing setuptools as a part of ensurepip and venv (python#101039)
  pythonGH-103484: Docs: add linkcheck allowed redirects entries for most cases (python#103569)
  pythongh-67230: update whatsnew note for csv changes (python#103598)
  ...
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3.7 (EOL) end of life 3.8 (EOL) end of life 3.9 only security fixes 3.10 only security fixes 3.11 only security fixes 3.12 bugs and security fixes stdlib Python modules in the Lib dir type-bug An unexpected behavior, bug, or error
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