cpython

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Thomas Wouters 12683e3ce8 Post 3.13.13

2026-04-07 23:28:57 +02:00

cpython

[3.13] gh-142183: Cache one datachunk per tstate to prevent alloc/dealloc thrashing (GH-145789) (#146123 )

2026-03-24 02:27:57 +01:00

internal

[3.13] gh-143050: Correct PyLong_FromString() to use _PyLong_Negate() (#145901 ) (#147437 )

2026-03-31 17:06:38 +02:00

abstract.h

[3.13] gh-134989: Implement PyObject_DelAttr() as a macro in the limited C API (GH-135021) (#135134 )

2025-06-04 17:10:51 +02:00

bltinmodule.h

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boolobject.h

[3.13] gh-134989: Fix Py_RETURN_NONE in the limited C API (GH-135165) (#135182 )

2025-06-05 15:02:09 +00:00

bytearrayobject.h

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bytesobject.h

gh-108765: Move standard includes to Python.h (#108769 )

2023-09-01 21:03:20 +02:00

ceval.h

gh-74929: Implement PEP 667 (GH-115153)

2024-05-04 12:12:10 +01:00

codecs.h

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compile.h

gh-109596: Ensure repeated rules in the grammar are not allowed and fix incorrect soft keywords (#109606 )

2023-09-22 19:03:23 +01:00

complexobject.h

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critical_section.h

[3.13] gh-119344: Make critical section API public (GH-119353) (#120856 )

2024-06-21 20:20:41 +00:00

datetime.h

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descrobject.h

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dictobject.h

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dynamic_annotations.h

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enumobject.h

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errcode.h

gh-107450: Check for overflow in the tokenizer and fix overflow test (#110832 )

2023-10-16 16:42:49 +02:00

exports.h

gh-108765: Move export code from pyport.h to exports.h (#108855 )

2023-09-04 01:04:05 +02:00

fileobject.h

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fileutils.h

gh-108765: Move stat() fiddling from pyport.h to fileutils.h (#108854 )

2023-09-03 21:32:13 +00:00

floatobject.h

[3.13] gh-121905: Consistently use "floating-point" instead of "floating point" (GH-121907) (GH-122012)

2024-07-19 09:13:08 +00:00

frameobject.h

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genericaliasobject.h

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import.h

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intrcheck.h

gh-106320: Remove private _PyOS_IsMainThread() function (#108605 )

2023-08-29 03:20:31 +00:00

iterobject.h

gh-106320: Remove _PyAnextAwaitable_Type from the public C API (#108597 )

2023-08-29 02:05:11 +00:00

listobject.h

gh-114329: Fix PyList_GetItemRef() limited C API definition (#117520 )

2024-04-03 21:02:42 +00:00

lock.h

[3.13] gh-136759: revert rename lock.h to pylock.h (GH-137041) (#137075 ) (#137166 )

2025-07-28 12:19:32 +00:00

longobject.h

gh-117021: Fix integer overflow in PyLong_AsPid() on non-Windows 64-bit platforms (GH-117064)

2024-03-20 15:39:53 +02:00

marshal.h

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memoryobject.h

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methodobject.h

gh-114626: Add again _PyCFunctionFastWithKeywords name (GH-115561)

2024-02-19 13:20:46 +01:00

modsupport.h

[3.13] gh-112136: Restore removed _PyArg_Parser (GH-121262) (#121344 )

2024-07-03 18:29:00 +00:00

moduleobject.h

gh-116322: Rename PyModule_ExperimentalSetGIL to PyUnstable_Module_SetGIL (GH-118645)

2024-05-06 18:59:36 +02:00

monitoring.h

gh-111997: C-API for signalling monitoring events (#116413 )

2024-05-04 08:23:50 +00:00

object.h

[3.13] gh-140487: Fix Py_RETURN_NOTIMPLEMENTED in limited C API 3.11 (GH-140636) (GH-140670)

2025-10-27 14:43:59 +01:00

objimpl.h

gh-102013: Move PyUnstable_GC_VisitObjects() to Include/cpython/objimpl.h (#115560 )

2024-02-16 15:49:13 +01:00

opcode_ids.h

GH-118095: Use broader specializations of CALL in tier 1, for better tier 2 support of calls. (GH-118322)

2024-05-04 12:11:11 +01:00

opcode.h

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osdefs.h

gh-108765: Reformat Include/osdefs.h (#108766 )

2023-09-01 14:35:39 +00:00

osmodule.h

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patchlevel.h

Post 3.13.13

2026-04-07 23:28:57 +02:00

py_curses.h

[3.13] bpo-44172: Keep reference to original window in curses subwindow objects (GH-26226) (GH-133370)

2025-05-04 11:15:43 +00:00

pyatomic.h

gh-108724: Add PyMutex and _PyParkingLot APIs (gh-109344)

2023-09-19 09:54:29 -06:00

pybuffer.h

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pycapsule.h

gh-108240: Add pycore_capsule.h internal header file (#108596 )

2023-08-29 01:20:02 +00:00

pydtrace.d

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pydtrace.h

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pyerrors.h

[3.13] gh-119521: Rename IncompleteInputError to _IncompleteInputError and remove from public API/ABI (GH-119680, GH-120955) (GH-120944)

2024-06-24 20:23:30 +02:00

pyexpat.h

[3.13] gh-90949: add Expat API to prevent XML deadly allocations (CVE-2025-59375) (GH-139234) (#139367 )

2025-11-02 12:39:11 +00:00

pyframe.h

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pyhash.h

gh-111545: Add Include/cpython/pyhash.h header file (#112063 )

2023-11-15 01:19:20 +01:00

pylifecycle.h

gh-117987: Restore several functions removed in Python 3.13 alpha 1 (GH-117993)

2024-04-18 15:20:38 +02:00

pymacconfig.h

gh-110820: Make sure processor specific defines are correct for Universal 2 build on macOS (#112828 )

2023-12-08 10:09:34 +01:00

pymacro.h

[3.13] gh-141370: Fix undefined behavior when using Py_ABS() (GH-141548) (#142304 )

2025-12-05 15:52:12 +00:00

pymath.h

[3.13] Revert "gh-136006: fix Py_NAN expansion on Solaris systems (GH-136575) (#138734 )" (#139239 )

2025-09-22 14:18:11 +00:00

pymem.h

gh-85283: Add PyMem_RawMalloc() to the limited C API (#108570 )

2023-10-17 02:41:51 +02:00

pyport.h

[3.13] gh-133256: Add _Py_NONSTRING macro (#133257 ) (#135135 )

2025-06-04 17:10:35 +02:00

pystate.h

gh-108867: Add PyThreadState_GetUnchecked() function (#108870 )

2023-10-03 16:53:51 +00:00

pystats.h

gh-108753: Enhance pystats (#108754 )

2023-09-06 15:54:59 +00:00

pystrcmp.h

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pystrtod.h

gh-106320: Remove private float C API functions (#108430 )

2023-08-24 19:09:49 +02:00

Python.h

[3.13] gh-136823: Update documentation on excluded headers in Python.h (GH-136824) (#137438 )

2025-08-05 22:16:24 +01:00

pythonrun.h

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pythread.h

[3.13] gh-87135: Hang non-main threads that attempt to acquire the GIL during finalization (GH-105805) (GH-137827)

2025-08-17 09:08:14 -07:00

pytypedefs.h

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rangeobject.h

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README.rst

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setobject.h

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sliceobject.h

gh-115754: Add Py_GetConstant() function (#116883 )

2024-03-21 16:07:00 +00:00

structmember.h

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structseq.h

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sysmodule.h

gh-117987: Restore several functions removed in Python 3.13 alpha 1 (GH-117993)

2024-04-18 15:20:38 +02:00

traceback.h

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tupleobject.h

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typeslots.h

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unicodeobject.h

gh-111089: Revert PyUnicode_AsUTF8() changes (#111833 )

2023-11-07 22:36:13 +00:00

warnings.h

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weakrefobject.h

gh-105927: Limit PyWeakref_GetRef() to limited C API 3.13 (#117091 )

2024-03-20 23:52:23 +01:00

README.rst

The Python C API
================

The C API is divided into these sections:

1. ``Include/``: Limited API
2. ``Include/cpython/``: CPython implementation details
3. ``Include/cpython/``, names with the ``PyUnstable_`` prefix: API that can
   change between minor releases
4. ``Include/internal/``, and any name with ``_`` prefix: The internal API

Information on changing the C API is available `in the developer guide`_

.. _in the developer guide: https://devguide.python.org/c-api/