gh-141004: Document C APIs for dictionary keys, values, and items by ZeroIntensity · Pull Request #141009 · python/cpython

ZeroIntensity · 2025-11-04T17:07:21Z

Issue: Document the entire C API #141004

📚 Documentation preview 📚: https://cpython-previews--141009.org.readthedocs.build/en/141009/c-api/dict.html#dictionary-objects

Co-authored-by: Petr Viktorin <encukou@gmail.com>

ZeroIntensity · 2025-11-12T23:06:32Z

@encukou, this PR is blocking #141136. Are you happy with this?

picnixz · 2025-11-12T23:22:56Z

+
+.. c:function:: int PyDictViewSet_Check(PyObject *o)
+
+ Return true if *o* is a view of a set inside a dictionary. This is currently


Can we use "op" for the argument as we use it everywhere else for "object pointer"?

TIL that's what it stood for, I thought it was "operand". I'll update it.

FTR there are other occurrences below

Ah, right. Fixed those too.

picnixz · 2025-11-12T23:45:33Z

+.. c:var:: PyTypeObject PyDictItems_Type
+
+ Type object for a view of dictionary items. In Python, this is the type of
+ the object returned by :meth:`dict.items`.


Don't we have collections.abc.DictViewSomething? or types.*?

We do, but I'm not sure it's worth pointing to it here, because there's no actual correlation between the two types at runtime.

encukou

Please consider:

a table to avoid repetitive prose
a single “Dict view objects” section with all these and PyDictViewSet_Check

But, the PR is an improvement as is.

ZeroIntensity · 2025-11-13T14:57:20Z

a single “Dict view objects” section with all these and PyDictViewSet_Check

I like that idea, I went with that. I'm not too sure how I would format this under a table.

miss-islington-app · 2025-11-13T15:02:25Z

Thanks @ZeroIntensity for the PR 🌮🎉.. I'm working now to backport this PR to: 3.13, 3.14.
🐍🍒⛏🤖

…ms (pythonGH-141009) (cherry picked from commit f72768f) Co-authored-by: Peter Bierma <zintensitydev@gmail.com> Co-authored-by: Petr Viktorin <encukou@gmail.com>

bedevere-app · 2025-11-13T15:02:34Z

GH-141512 is a backport of this pull request to the 3.14 branch.

…ms (pythonGH-141009) (cherry picked from commit f72768f) Co-authored-by: Peter Bierma <zintensitydev@gmail.com> Co-authored-by: Petr Viktorin <encukou@gmail.com>

bedevere-app · 2025-11-13T15:02:39Z

GH-141513 is a backport of this pull request to the 3.13 branch.

…ems (GH-141009) (GH-141512) gh-141004: Document C APIs for dictionary keys, values, and items (GH-141009) (cherry picked from commit f72768f) Co-authored-by: Peter Bierma <zintensitydev@gmail.com> Co-authored-by: Petr Viktorin <encukou@gmail.com>

…ems (GH-141009) (GH-141513) gh-141004: Document C APIs for dictionary keys, values, and items (GH-141009) (cherry picked from commit f72768f) Co-authored-by: Peter Bierma <zintensitydev@gmail.com> Co-authored-by: Petr Viktorin <encukou@gmail.com>

* 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) ...

* '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) ...

…ms (pythonGH-141009) Co-authored-by: Petr Viktorin <encukou@gmail.com>

Document C APIs for dictionary keys, values, and items.
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bedevere-appBot added awaiting core review docs Documentation in the Doc dir skip news labels Nov 4, 2025

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bedevere-appBot mentioned this pull request Nov 4, 2025
Document the entire C API #141004
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ZeroIntensity added needs backport to 3.13 bugs and security fixes needs backport to 3.14 bugs and security fixes labels Nov 4, 2025

encukou reviewed Nov 4, 2025
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Comment threadDoc/c-api/dict.rst Outdated

Update Doc/c-api/dict.rst
de6b12f
Co-authored-by: Petr Viktorin <encukou@gmail.com>

ZeroIntensity commented Nov 5, 2025
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Comment threadDoc/c-api/dict.rst Outdated

ZeroIntensity added 2 commits November 5, 2025 09:27

Remove iterator types
fcee529

Merge branch 'main' into document-missing-dict
823ace9

ZeroIntensity mentioned this pull request Nov 12, 2025
gh-141004: Document PyODict* APIs #141136
Merged

picnixz reviewed Nov 12, 2025
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Use "op" instead of "o".
2cd976b

picnixz reviewed Nov 12, 2025
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"o" -> "op" (for real this time)
66f3faa

encukou approved these changes Nov 13, 2025
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bedevere-appBot added awaiting merge and removed awaiting core review labels Nov 13, 2025

Add all under one section
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ZeroIntensity enabled auto-merge (squash) November 13, 2025 14:57

ZeroIntensity merged commit f72768f into python:mainNov 13, 2025
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ZeroIntensity deleted the document-missing-dict branch November 13, 2025 15:02

github-project-automationBot moved this from Todo to Done in Docs PRs Nov 13, 2025

bedevere-appBot removed the awaiting merge label Nov 13, 2025

bedevere-appBot removed the needs backport to 3.14 bugs and security fixes label Nov 13, 2025

bedevere-appBot removed the needs backport to 3.13 bugs and security fixes label Nov 13, 2025

StanFromIreland pushed a commit to StanFromIreland/cpython that referenced this pull request Dec 6, 2025
pythongh-141004: Document C APIs for dictionary keys, values, and ite…
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…ms (pythonGH-141009) Co-authored-by: Petr Viktorin <encukou@gmail.com>


		.. c:function:: int PyDictViewSet_Check(PyObject *o)

		Return true if o is a view of a set inside a dictionary. This is currently

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