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Improve readability of `typing._ProtocolMeta.__instancecheck__` by AlexWaygood · Pull Request #104649 · python/cpython

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This doesn't change behaviour at all. It might improve performance slightly for isinstance() checks against concrete subclasses of protocols, but the difference wasn't that significant. This is mainly just a cleanup to improve readability, and make the code more maintainable.

@AlexWaygood AlexWaygood merged commit a412fc5 into python:main

May 19, 2023

@AlexWaygood AlexWaygood deleted the protocolmeta-refactor branch

May 19, 2023 13:30

carljm added a commit to gsallam/cpython_with_perfmap_apii that referenced this pull request

May 20, 2023
* main: (30 commits)
  pythongh-103987: fix several crashes in mmap module (python#103990)
  docs: fix wrong indentation causing rendering error in dis page (python#104661)
  pythongh-94906: Support multiple steps in math.nextafter (python#103881)
  pythongh-104472: Skip `test_subprocess.ProcessTestCase.test_empty_env` if ASAN is enabled (python#104667)
  pythongh-103839: Allow building Tkinter against Tcl 8.7 without external libtommath (pythonGH-103842)
  pythongh-85984: New additions and improvements to the tty library. (python#101832)
  pythongh-104659: Consolidate python examples in enum documentation (python#104665)
  pythongh-92248: Deprecate `type`, `choices`, `metavar` parameters of `argparse.BooleanOptionalAction` (python#103678)
  pythongh-104645: fix error handling in marshal tests (python#104646)
  pythongh-104600: Make type.__type_params__ writable (python#104634)
  pythongh-104602: Add additional test for listcomp with lambda (python#104639)
  pythongh-104640: Disallow walrus in comprehension within type scopes (python#104641)
  pythongh-103921: Rename "type" header in argparse docs (python#104654)
  Improve readability of `typing._ProtocolMeta.__instancecheck__` (python#104649)
  pythongh-96522: Fix deadlock in pty.spawn (python#96639)
  pythonGH-102818: Do not call `PyTraceBack_Here` in sys.settrace trampoline.  (pythonGH-104579)
  pythonGH-103545: Add macOS specific constants for ``os.setpriority`` to ``os`` (python#104606)
  pythongh-104623: Update macOS installer to SQLite 3.42.0 (pythonGH-104624)
  pythongh-104619: never leak comprehension locals to outer locals() (python#104637)
  pythongh-104602: ensure all cellvars are known up front (python#104603)
  ...

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@JelleZijlstra JelleZijlstra JelleZijlstra approved these changes

@gvanrossum gvanrossum Awaiting requested review from gvanrossum

@Fidget-Spinner Fidget-Spinner Awaiting requested review from Fidget-Spinner

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@AlexWaygood @JelleZijlstra @bedevere-bot