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GeezerVison is showing github.com — gh-140873: Add support of non-descriptor callables in functools.singledispatchmethod() by serhiy-storchaka · Pull Request #140884 · python/cpython

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@serhiy-storchaka

@serhiy-storchaka serhiy-storchaka commented Nov 1, 2025 •
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  • Issue: Allow non-descriptor callables in functools.singledispatchmethod #140873

📚 Documentation preview 📚: https://cpython-previews--140884.org.readthedocs.build/

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@serhiy-storchaka
pythongh-140873: Add support of non-descriptor callables in functools…
ab8e8e9 
….singledispatchmethod()
@serhiy-storchaka
serhiy-storchaka requested review from AA-Turner and rhettinger as code owners November 1, 2025 13:43
@bedevere-app bedevere-app Bot added the awaiting core review label Nov 1, 2025
@bedevere-app bedevere-app Bot mentioned this pull request Nov 1, 2025
Allow non-descriptor callables in functools.singledispatchmethod #140873
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@emmatyping
emmatyping self-requested a review November 1, 2025 20:06
emmatyping
emmatyping requested changes Nov 2, 2025
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Could you please also add a regression test where singledispatchmethod decorates a descriptor method but a non-descriptor callable is registered like in the original issues? Just to make sure that never regresses.

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@bedevere-app bedevere-app Bot added awaiting changes and removed awaiting core review labels Nov 2, 2025
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bedevere-app Bot commented Nov 2, 2025

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@serhiy-storchaka
Add more tests.
7132686
emmatyping
emmatyping approved these changes Nov 3, 2025
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Thanks! This looks good.

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@bedevere-app bedevere-app Bot added awaiting merge and removed awaiting changes labels Nov 3, 2025
@serhiy-storchaka
serhiy-storchaka merged commit b2b68d4 into python:main Nov 13, 2025
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@bedevere-app bedevere-app Bot removed the awaiting merge label Nov 13, 2025
CuriousLearner added a commit to CuriousLearner/cpython that referenced this pull request Nov 13, 2025
@CuriousLearner
Merge branch 'main' into fix-issue21914
b9f473c 
* main: (463 commits)
  pythongh-140601: Add ResourceWarning to iterparse when not closed (pythonGH-140603)
  pythongh-137969: Fix double evaluation of `ForwardRef`s which rely on globals (python#140974)
  pythongh-139109: A new tracing JIT compiler frontend for CPython (pythonGH-140310)
  pythongh-141004: Document `PyErr_RangedSyntaxLocationObject` (python#141521)
  pythongh-140873: Add support of non-descriptor callables in functools.singledispatchmethod() (pythonGH-140884)
  pythongh-139653: Add PyUnstable_ThreadState_SetStackProtection() (python#139668)
  pythongh-141004: Document `PyCode_Optimize` (pythonGH-141378)
  pythongh-141004: Document C APIs for dictionary keys, values, and items (pythonGH-141009)
  pythongh-137959: Fix `TIER1_TO_TIER2` macro name in JIT InternalDocs (pythonGH-141496)
  pythongh-139871: Add `bytearray.take_bytes([n])` to efficiently extract `bytes` (pythonGH-140128)
  pythongh-140601: Refactor ElementTree.iterparse() tests (pythonGH-141499)
  pythongh-135801: Add the module parameter to compile() etc (pythonGH-139652)
  pythongh-140260: fix data race in `_struct` module initialization with subinterpreters (python#140909)
  pythongh-137109: refactor warning about threads when forking (python#141438)
  pythongh-141004: Document `PyRun_InteractiveOneObject` (pythonGH-141405)
  pythongh-124111: Fix TCL 9 thread detection (pythonGH-128103)
  pythongh-141442: Add escaping to iOS testbed arguments (python#141443)
  pythongh-140936: Fix JIT assertion crash at finalization if some generator is alive (pythonGH-140969)
  Add details about JIT build infrastructure and updating dependencies to `Tools/jit` (python#141167)
  pythongh-141412: Use reliable target URL for urllib example (pythonGH-141428)
  ...
CuriousLearner added a commit to CuriousLearner/cpython that referenced this pull request Nov 14, 2025
@CuriousLearner
Merge branch 'main' of github.com:python/cpython into fix-Issue18387
c46ecc5 
* 'main' of github.com:python/cpython: (464 commits)
  pythongh-140601: Add ResourceWarning to iterparse when not closed (pythonGH-140603)
  pythongh-137969: Fix double evaluation of `ForwardRef`s which rely on globals (python#140974)
  pythongh-139109: A new tracing JIT compiler frontend for CPython (pythonGH-140310)
  pythongh-141004: Document `PyErr_RangedSyntaxLocationObject` (python#141521)
  pythongh-140873: Add support of non-descriptor callables in functools.singledispatchmethod() (pythonGH-140884)
  pythongh-139653: Add PyUnstable_ThreadState_SetStackProtection() (python#139668)
  pythongh-141004: Document `PyCode_Optimize` (pythonGH-141378)
  pythongh-141004: Document C APIs for dictionary keys, values, and items (pythonGH-141009)
  pythongh-137959: Fix `TIER1_TO_TIER2` macro name in JIT InternalDocs (pythonGH-141496)
  pythongh-139871: Add `bytearray.take_bytes([n])` to efficiently extract `bytes` (pythonGH-140128)
  pythongh-140601: Refactor ElementTree.iterparse() tests (pythonGH-141499)
  pythongh-135801: Add the module parameter to compile() etc (pythonGH-139652)
  pythongh-140260: fix data race in `_struct` module initialization with subinterpreters (python#140909)
  pythongh-137109: refactor warning about threads when forking (python#141438)
  pythongh-141004: Document `PyRun_InteractiveOneObject` (pythonGH-141405)
  pythongh-124111: Fix TCL 9 thread detection (pythonGH-128103)
  pythongh-141442: Add escaping to iOS testbed arguments (python#141443)
  pythongh-140936: Fix JIT assertion crash at finalization if some generator is alive (pythonGH-140969)
  Add details about JIT build infrastructure and updating dependencies to `Tools/jit` (python#141167)
  pythongh-141412: Use reliable target URL for urllib example (pythonGH-141428)
  ...
CuriousLearner added a commit to CuriousLearner/cpython that referenced this pull request Nov 14, 2025
@CuriousLearner
Merge branch 'main' of github.com:python/cpython into fix-issue24255
c240289 
* 'main' of github.com:python/cpython: (464 commits)
  pythongh-140601: Add ResourceWarning to iterparse when not closed (pythonGH-140603)
  pythongh-137969: Fix double evaluation of `ForwardRef`s which rely on globals (python#140974)
  pythongh-139109: A new tracing JIT compiler frontend for CPython (pythonGH-140310)
  pythongh-141004: Document `PyErr_RangedSyntaxLocationObject` (python#141521)
  pythongh-140873: Add support of non-descriptor callables in functools.singledispatchmethod() (pythonGH-140884)
  pythongh-139653: Add PyUnstable_ThreadState_SetStackProtection() (python#139668)
  pythongh-141004: Document `PyCode_Optimize` (pythonGH-141378)
  pythongh-141004: Document C APIs for dictionary keys, values, and items (pythonGH-141009)
  pythongh-137959: Fix `TIER1_TO_TIER2` macro name in JIT InternalDocs (pythonGH-141496)
  pythongh-139871: Add `bytearray.take_bytes([n])` to efficiently extract `bytes` (pythonGH-140128)
  pythongh-140601: Refactor ElementTree.iterparse() tests (pythonGH-141499)
  pythongh-135801: Add the module parameter to compile() etc (pythonGH-139652)
  pythongh-140260: fix data race in `_struct` module initialization with subinterpreters (python#140909)
  pythongh-137109: refactor warning about threads when forking (python#141438)
  pythongh-141004: Document `PyRun_InteractiveOneObject` (pythonGH-141405)
  pythongh-124111: Fix TCL 9 thread detection (pythonGH-128103)
  pythongh-141442: Add escaping to iOS testbed arguments (python#141443)
  pythongh-140936: Fix JIT assertion crash at finalization if some generator is alive (pythonGH-140969)
  Add details about JIT build infrastructure and updating dependencies to `Tools/jit` (python#141167)
  pythongh-141412: Use reliable target URL for urllib example (pythonGH-141428)
  ...
StanFromIreland pushed a commit to StanFromIreland/cpython that referenced this pull request Dec 6, 2025
@serhiy-storchaka @StanFromIreland
pythongh-140873: Add support of non-descriptor callables in functools…
dfd9a8c 
….singledispatchmethod() (pythonGH-140884)
@serhiy-storchaka
serhiy-storchaka deleted the singledispatchmethod-non-descriptor branch July 1, 2026 16:47
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Reviewers

@emmatyping emmatyping emmatyping approved these changes
@rhettinger rhettinger Awaiting requested review from rhettinger rhettinger is a code owner
@AA-Turner AA-Turner Awaiting requested review from AA-Turner AA-Turner is a code owner

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@serhiy-storchaka @emmatyping
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