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Victor Stinner 71f6c005dc gh-157710: Defer allocation in PyUnicodeWriter_Create() (#157969 )

PyUnicodeWriter_Create(length) no longer allocates 'length'
characters immediately. The allocation of the buffer is now done
lazily at the first write, except if the read-only optimization is
used. So the read-only optimization can also be used even if length
is greater than 0.

No longer overallocate the first buffer (at the first write).
Only overallocate when the buffer is resized (at the second write).
It avoids the need to truncate in PyUnicodeWriter_Finish() when
PyUnicodeWriter_Create(length) used the exact output length.

Add get_buffer() method to writer tests.

2026-09-23 11:20:30 +02:00

clinic

gh-113318: Better implementation of @getter and @setter in Argument Clinic (GH-156066)

2026-09-19 18:48:39 +03:00

mimalloc

gh-152433: Allow building mimalloc for Windows UWP (GH-152477)

2026-09-07 17:35:51 +01:00

stringlib

gh-156939: Update UTF-8 encoder for PyBytesWriter changes (#157383 )

2026-09-13 01:14:17 +00:00

abstract.c

gh-157526: Call __instancecheck__ and __subclasscheck__ without creating a bound method (#157670 )

2026-09-22 11:16:30 +05:30

boolobject.c

gh-111178: remove redundant casts for functions with correct signatures (#131673 )

2025-04-01 17:18:11 +02:00

bytearrayobject.c

gh-156939: Detect buffer overflow in bytes and bytearray (#157529 )

2026-09-15 16:34:17 +02:00

bytes_methods.c

gh-150285: Fix too long docstrings in builtins (GH-150293)

2026-05-24 15:03:32 +03:00

bytesobject.c

gh-157710: Avoid resize in PyUnicodeWriter_Finish() for singleton (#157862 )

2026-09-20 16:25:20 +02:00

call.c

gh-145779: Improve classmethod/staticmethod scaling in free-threaded build (#145826 )

2026-03-17 14:24:44 -04:00

capsule.c

gh-76595: PyCapsule_Import() now imports submodules if needed (GH-6898)

2026-08-10 21:36:15 +03:00

cellobject.c

Fix a stray newline in the cell type docstring (#157240 )

2026-09-10 16:54:47 +01:00

classobject.c

gh-145779: Improve classmethod/staticmethod scaling in free-threaded build (#145826 )

2026-03-17 14:24:44 -04:00

codeobject.c

gh-155742: Use PyBytesWriter in codeobject.c (#157345 )

2026-09-12 05:43:16 +02:00

complexobject.c

gh-155526: Don't check errno in abs(complex) (#155527 )

2026-09-11 17:46:59 +02:00

descrobject.c

gh-154044: Fix data race on descriptor __qualname__ in free-threading build (#154691 )

2026-08-04 14:54:02 +05:30

dictnotes.txt

bpo-46845: Reduce dict size when all keys are Unicode (GH-31564)

2022-03-02 08:09:28 +09:00

dictobject.c

gh-157495: Avoid Py_MIN()/Py_MAX() side effects (#157591 )

2026-09-16 18:44:55 +02:00

enumobject.c

gh-87613: Argument Clinic vectorcall decorator (GH-145381)

2026-09-10 16:53:36 +02:00

exceptions.c

gh-113318: Better implementation of @getter and @setter in Argument Clinic (GH-156066)

2026-09-19 18:48:39 +03:00

fileobject.c

gh-156261: Move converters used in several files to Argument Clinic (GH-156262)

2026-08-23 19:47:55 +03:00

floatobject.c

gh-157695: Rename HAVE_FLOAT16 macro to _Py_HAVE_FLOAT16 (#157752 )

2026-09-19 10:34:26 +02:00

frameobject.c

gh-113318: Better implementation of @getter and @setter in Argument Clinic (GH-156066)

2026-09-19 18:48:39 +03:00

funcobject.c

gh-113318: Better implementation of @getter and @setter in Argument Clinic (GH-156066)

2026-09-19 18:48:39 +03:00

genericaliasobject.c

gh-155752: Do not crash when GenericAlias parameters change during substitution (#155761 )

2026-08-13 22:14:24 -07:00

genobject.c

gh-144446: Fix thread safety of gi_frame, cr_frame and ag_frame in free-threading (#156037 )

2026-09-02 23:26:04 +05:30

interpolationobject.c

gh-150319: Replace all documentation which says "See PEP 585" (#150325 )

2026-06-02 21:13:34 +01:00

iterobject.c

gh-157361: Implement anext() in Python instead of C (#157362 )

2026-09-16 18:58:59 +05:30

lazyimportobject.c

gh-154196: Improve AttributeError messages from unresolved lazy imports (#154688 )

2026-08-16 14:25:03 +01:00

listobject.c

gh-148442: Eliminate race condition in list rich comparison (GH-148531)

2026-08-30 10:29:31 +03:00

listsort.txt

gh-135551: Change how sorting picks minimum run length (#135553 )

2025-06-26 23:48:05 -05:00

longobject.c

gh-157710: Add _PyUnicodeWriter_CanWrite() function (#157712 )

2026-09-18 00:32:50 +00:00

memoryobject.c

gh-78959: Add order parameter to memoryview.cast() (GH-153663)

2026-08-03 22:06:00 +03:00

methodobject.c

gh-135607: remove null checking of weakref list in dealloc of extension modules and objects (#135614 )

2025-06-30 11:14:31 +00:00

moduleobject.c

gh-153236: Propagate lazy submodule import errors (#153237 )

2026-07-18 14:28:43 +02:00

namespaceobject.c

gh-143636: fix a crash when calling `__replace__ on invalid SimpleNamespace` instances (#143655 )

2026-03-14 09:58:15 +00:00

object_layout_312.gv

GH-115776: Embed the values array into the object, for "normal" Python objects. (GH-116115)

2024-04-02 11:59:21 +01:00

object_layout_312.png

gh-71648: Optimize PNG files (GH-138842)

2025-09-12 20:13:05 +00:00

object_layout_313.gv

GH-115776: Embed the values array into the object, for "normal" Python objects. (GH-116115)

2024-04-02 11:59:21 +01:00

object_layout_313.png

gh-71648: Optimize PNG files (GH-138842)

2025-09-12 20:13:05 +00:00

object_layout_full_312.gv

GH-96068: Document object layout (GH-96069)

2022-08-23 13:55:43 +01:00

object_layout_full_312.png

gh-71648: Optimize PNG files (GH-138842)

2025-09-12 20:13:05 +00:00

object_layout_full_313.gv

GH-115776: Embed the values array into the object, for "normal" Python objects. (GH-116115)

2024-04-02 11:59:21 +01:00

object_layout_full_313.png

gh-71648: Optimize PNG files (GH-138842)

2025-09-12 20:13:05 +00:00

object_layout.md

GH-115776: Allow any fixed sized object to have inline values (GH-123192)

2024-08-21 15:52:04 +01:00

object.c

gh-157840: Special-case member descriptors when using hasattr (GH-157866)

2026-09-20 22:08:23 +00:00

obmalloc.c

gh-157495: Implement Py_MIN/MAX/ABS using typeof() (#157496 )

2026-09-15 23:16:43 +02:00

odictobject.c

gh-151627: fix thread safety of OrderedDict iterator creation (#151688 )

2026-08-01 15:27:14 +05:30

picklebufobject.c

gh-135607: remove null checking of weakref list in dealloc of extension modules and objects (#135614 )

2025-06-30 11:14:31 +00:00

rangeobject.c

gh-129068: Make range iterators thread-safe (gh-142886)

2025-12-18 13:11:51 -05:00

README

Issue #18093 : Factor out the programs that embed the runtime

2014-07-25 21:52:14 +10:00

sentinelobject.c

gh-148829: Make sentinels' repr and module customizable (#149654 )

2026-05-19 09:18:56 -07:00

setobject.c

gh-152235: Defer GC tracking in set.union and set.difference (gh-152290)

2026-06-26 17:11:33 +00:00

sliceobject.c

gh-150319: Replace all documentation which says "See PEP 585" (#150325 )

2026-06-02 21:13:34 +01:00

structseq.c

gh-148119: Refactor get_type_attr_as_size to improve error handling in structseq.c (#148120 )

2026-04-06 17:41:30 +05:30

templateobject.c

gh-150319: Replace all documentation which says "See PEP 585" (#150325 )

2026-06-02 21:13:34 +01:00

tupleobject.c

gh-87613: Argument Clinic vectorcall decorator (GH-145381)

2026-09-10 16:53:36 +02:00

typeobject.c

gh-157526: Call __instancecheck__ and __subclasscheck__ without creating a bound method (#157670 )

2026-09-22 11:16:30 +05:30

typevarobject.c

gh-157621: Clear weakrefs for ParamSpec attributes (#157622 )

2026-09-17 02:48:25 +00:00

unicode_format.c

gh-151845: Fix formatfloat() return-value contract in unicode_format.c (#151846 )

2026-06-21 20:16:30 +03:00

unicode_formatter.c

gh-157495: Avoid Py_MIN()/Py_MAX() side effects (#157591 )

2026-09-16 18:44:55 +02:00

unicode_writer.c

gh-157710: Defer allocation in PyUnicodeWriter_Create() (#157969 )

2026-09-23 11:20:30 +02:00

unicodectype.c

gh-129117: Add unicodedata.isxidstart() function (#140269 )

2025-10-30 10:18:12 +00:00

unicodeobject.c

gh-157695: Rename HAVE_ICONV to _Py_HAVE_ICONV (#157821 )

2026-09-22 07:28:48 +02:00

unicodetype_db.h

fixes gh-157633: Update Unicode data to Unicode 18.0.0 (#157634 )

2026-09-16 11:34:53 -07:00

unionobject.c

gh-150319: Replace all documentation which says "See PEP 585" (#150325 )

2026-06-02 21:13:34 +01:00

weakrefobject.c

gh-80384: Check that callback is callable at weak reference creation (GH-151145)

2026-06-10 13:34:55 +03:00

README

Source files for various builtin objects