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Title: bpo-38250: [Enum] single-bit flags are canonical by ethanfurman · Pull Request #24215 · python/cpython · GitHub

Open Graph Title: bpo-38250: [Enum] single-bit flags are canonical by ethanfurman · Pull Request #24215 · python/cpython

X Title: bpo-38250: [Enum] single-bit flags are canonical by ethanfurman · Pull Request #24215 · python/cpython

Description: Flag members are now divided by one-bit verses multi-bit, with multi-bit being treated as aliases. Iterating over a flag only returns the contained single-bit flags. Iterating, repr(), and str() show members in definition order. When constructing combined-member flags, any extra integer values are either discarded (CONFORM), turned into ints (EJECT) or treated as errors (STRICT). Flag classes can specify which of those three behaviors is desired: >>> class Test(Flag, boundary=CONFORM): ... ONE = 1 ... TWO = 2 ... >>> Test(5) Besides the three above behaviors, there is also KEEP, which should not be used unless necessary -- for example, _convert_ specifies KEEP as there are flag sets in the stdlib that are incomplete and/or inconsistent (e.g. ssl.Options). KEEP will, as the name suggests, keep all bits; however, iterating over a flag with extra bits will only return the canonical flags contained, not the extra bits. https://bugs.python.org/issue38250

Open Graph Description: Flag members are now divided by one-bit verses multi-bit, with multi-bit being treated as aliases. Iterating over a flag only returns the contained single-bit flags. Iterating, repr(), and str() s...

X Description: Flag members are now divided by one-bit verses multi-bit, with multi-bit being treated as aliases. Iterating over a flag only returns the contained single-bit flags. Iterating, repr(), and str() s...

Opengraph URL: https://github.com/python/cpython/pull/24215

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5f522d3 [Enum] fix Flag iteration, repr(), and str() ethanfurman Jan 13, 2021 https://github.com/python/cpython/pull/24215/commits/5f522d38139dc6d9bd7781500f811016b683b66f
f7f9e72 add boundary KEEP for Flags (default for _convert_) ethanfurman Jan 14, 2021 https://github.com/python/cpython/pull/24215/commits/f7f9e728e123dcaecccda0a96d4cdff6cce5bd01
d289ba3 update re.RegexFlag for new Flag implementation ethanfurman Jan 14, 2021 https://github.com/python/cpython/pull/24215/commits/d289ba3e0551ae7a7c8cdbec0e445764812a03e3
72dbdd7 remove extra white space ethanfurman Jan 14, 2021 https://github.com/python/cpython/pull/24215/commits/72dbdd70f88781c898cf7bac2af94584a94f169f
210fae7 test that zero-valued members are empty ethanfurman Jan 14, 2021 https://github.com/python/cpython/pull/24215/commits/210fae7fbf4ba3d3ab3e1a356a3a9542321a3fb8
48bcd07 update tests to confirm CONFORM with negate ethanfurman Jan 14, 2021 https://github.com/python/cpython/pull/24215/commits/48bcd07c3738bc5db889068af8525f911aa39df7
1fd7471 update aenum.rst; add doctest to test_enum ethanfurman Jan 14, 2021 https://github.com/python/cpython/pull/24215/commits/1fd7471f351be3e477a52ded6a2303612cd0d06e
aa425e6 fix doc test ethanfurman Jan 14, 2021 https://github.com/python/cpython/pull/24215/commits/aa425e6de2670e3a67b63e63c8ace521a0343f7b
4786942 optimizations ethanfurman Jan 14, 2021 https://github.com/python/cpython/pull/24215/commits/4786942ead0a4c0d95093476861ee8dfa99470d0
45565b2 formatting ethanfurman Jan 14, 2021 https://github.com/python/cpython/pull/24215/commits/45565b248ec416a17c58715fdf126b87a6441c21
806c8c6 add news entry ethanfurman Jan 14, 2021 https://github.com/python/cpython/pull/24215/commits/806c8c62f14483a2e19e35e9b45b7e15005cce4f
668c9a9 fix formatting of news entry ethanfurman Jan 15, 2021 https://github.com/python/cpython/pull/24215/commits/668c9a9d14e5c6495ea75abf762c9e3a6e5d0167
9bd9e97 update iteration method and order ethanfurman Jan 20, 2021 https://github.com/python/cpython/pull/24215/commits/9bd9e97469c5592d43973bf3e93ea9a39f5298e1
18bcbac add John Belmonte ethanfurman Jan 20, 2021 https://github.com/python/cpython/pull/24215/commits/18bcbacaab7026eadf3550eb8fab9fa7439d3dc8
f1c4584 more bit-fiddling improvements ethanfurman Jan 20, 2021 https://github.com/python/cpython/pull/24215/commits/f1c45843b7e36f3dbfa2e0f323279c45c8cf2dbf
e3713aa use pop() instead of "del" ethanfurman Jan 20, 2021 https://github.com/python/cpython/pull/24215/commits/e3713aaceb7238d79496f3c21cc4051abe9d1c33
c4ec211 update DynamicClassAttribute __doc__ ethanfurman Jan 20, 2021 https://github.com/python/cpython/pull/24215/commits/c4ec21165c88c7034bb019e06acbc332e8534250
00b2bfe remove formatting changes ethanfurman Jan 20, 2021 https://github.com/python/cpython/pull/24215/commits/00b2bfe72474edac387108aef80b7b69b5efd40b
9f432c3 remove extra parens ethanfurman Jan 20, 2021 https://github.com/python/cpython/pull/24215/commits/9f432c3358cc0db3e09be584c9a97aaa705ac878
15c060a remove formatting changes ethanfurman Jan 20, 2021 https://github.com/python/cpython/pull/24215/commits/15c060a2245c201f87371617e067768c296cc7b9
86d7669 remove formatting ethanfurman Jan 20, 2021 https://github.com/python/cpython/pull/24215/commits/86d76698c1fcae2b6bc7ef876300710615995841
55915df simplify determination of member iteration ethanfurman Jan 22, 2021 https://github.com/python/cpython/pull/24215/commits/55915df64a7c5e5e7051162de8bb14ec1570a678
95bf9c8 add note about next auto() value for Enum and Flag ethanfurman Jan 25, 2021 https://github.com/python/cpython/pull/24215/commits/95bf9c84aa79e4198e779290a96a1eba35dc2c68
41ac1ce local name optimizations ethanfurman Jan 25, 2021 https://github.com/python/cpython/pull/24215/commits/41ac1cecf1677e86e582183c114185e0b3cee484
3ea814e remove commented-out code ethanfurman Jan 25, 2021 https://github.com/python/cpython/pull/24215/commits/3ea814e21c2a8f2e0d010faaf4615ee67563246a
4983558 add test for next auto() and _order_ ethanfurman Jan 25, 2021 https://github.com/python/cpython/pull/24215/commits/4983558af7b1d14d12eeea038b2f63811bc4c354
651da18 raise TypeError if _value_ not added in custom new ethanfurman Jan 25, 2021 https://github.com/python/cpython/pull/24215/commits/651da184f1ae6ff5c067a658130473fb13e09422
6e99d48 enable doc tests, update formatting ethanfurman Jan 25, 2021 https://github.com/python/cpython/pull/24215/commits/6e99d485737c71bef77abb8979c607dc6f38024c
b52c5a2 fix note ethanfurman Jan 25, 2021 https://github.com/python/cpython/pull/24215/commits/b52c5a2d8aef05914ead91e2f0404b54c6187f5b
8d7b272 Update 2021-01-14-15-07-16.bpo-38250.1fvhOk.rst ethanfurman Jan 25, 2021 https://github.com/python/cpython/pull/24215/commits/8d7b2724fbec9eaa670dcfe3f7a942f31494cc5c
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