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Cpython v3.14.3

Cpython: v3.14.3 Release

Release date:
February 3, 2026
Previous version:
v3.14.2 (released December 5, 2025)
Magnitude:
398 Diff Delta
Contributors:
12 total committers
Data confidence:
Commits:
21 impacting commits

196 Features Released with v3.14.3

[3.14] gh-86139: Correct NamedTuple and TypedDict's type in typing.rst (GH-143692)
#143696
[3.14] Remove outdated comment about `excess_args` warning in `object.__init__` (GH-143669)
#143680
[3.14] Doc: remove duplicate GitHub issue reference in "What's New in Python 3.13" (GH-143654)
#143656
[3.14] gh-143377: fix crashes in `_interpreters.capture_exception` (GH-143418)
#143652
[3.14] gh-143641: Make `ready_to_import` always remove tempdir from `sys.path` (GH-143642)
#143647
[3.14] gh-141536: Fix a crash when running test_capi *after* test_code in the same process (GH-141537)
#143522
[3.14] gh-72239: Add note distinguishing concurrent.futures.Future from asyncio.Future (GH-143288)
#143607
[3.14] gh-142829: Fix use-after-free in `Context.__eq__` via re-entrant `ContextVar.set` (GH-142905)
#143627
[3.14] Fix dunder name typo in compiler code comment (GH-143374)
#143386
[3.14] gh-143460: Skip infinite recusion tests for infinite stack size (GH-143606)
#143619
[3.14] gh-143191: Use _PyOS_MIN_STACK_SIZE in _thread.stack_size() (GH-143601)
#143611
[3.14] gh-106318: Add examples for str.rfind() method (GH-143582)
#143616
[3.14] gh-106318: Improve str.removeprefix() and str.removesuffix() docs (GH-143580)
#143614
[3.14] gh-143429: Use compile-time NaN encoding detection for test_struct (GH-143432)
#143595
[3.14] gh-142095: Use thread local frame info in `py-bt` and `py-bt-full` when available (gh-143371)
#143566
[3.14] gh-143528: Fix test_time.test_thread_time() (GH-143558)
#143559
[3.14] gh-143089: Fix ParamSpec default examples to use list instead of tuple (GH-143179)
#143538
[3.14] gh-143517: Fix an edge case in rewriting stringified starred annotations (GH-143518)
#143540
[3.14] Fix a typo in STORE_SLICE docs (GH-143500)
#143533
[3.14] gh-106318: Add examples for str.casefold() and str.lower() methods (GH-142154)
#143524
[3.14] gh-142991: socketmodule: fixed getsockaddrlen() for PF_DIVERT socket (GH-142993)
#143481
[3.13] gh-106318: Add example for str.index() (GH-137023)
#143501
[3.14] gh-133315: Document that compat32 should not be used with MIMEPart/EmailMessage (GH-143307)
#143496
[3.14] Doc: Fix missing closing parenthesis in argparse example (GH-143488)
#143489
[3.14] gh-142302: Fix mkstemp() documentation: clarify file descriptor inheritance behavior (GH-142338)
#143486
[3.14] gh-106318: Add examples for str.isprintable() (GH-140043)
#143483
[3.14] gh-143434: Fix typo in zstd documentation (GH-143437)
#143444
[3.14] gh-143309: fix `test_execve_env_concurrent_mutation_with_fspath_posix` buildbot failure (GH-143415)
#143419
[3.14] gh-143309: fix UAF in `os.execve` when the environment is concurrently mutated (GH-143314)
#143398
[3.14] gh-143308: fix UAF when PickleBuffer is concurrently mutated in a callback (GH-143312)
#143396

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Top Contributors in v3.14.3

StanFromIreland
nascheme
jihugo
cmaloney
sethmlarson
stratakis
methane
donBarbos
webknjaz
picnixz

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