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Cpython v3.14.0b1

Cpython: v3.14.0b1 Release

Release date:
July 14, 2025
Previous version:
v3.14.0a7 (released July 12, 2025)
Magnitude:
86,620 Diff Delta
Contributors:
154 total committers
Data confidence:
Commits:
1,657 impacting commits

255 Features Released with v3.14.0b1

gh-132661: Implement PEP 750
#132662
gh-132732: Automatically constant evaluate pure operations
#132733
gh-100926: Move ctype's pointers cache to StgInfo
#131282
gh-132097: allow AC to disable fastcall convention to avoid UBSan failures
#131605
gh-131586: Avoid refcount contention in context managers
#131851
gh-131591: Allow pdb to attach to a running process
#132451
gh-123539: Improve SyntaxError msg for `import as` with not a name
#123629
gh-132449: Improve syntax error messages for keywords with typos
#132450
GH-131798: Remove JIT guards for `dict`, `frozenset`, `list`, `set`, and `tuple`
#132289
functools.lru_cache prevents function being cached from executing concurrently under free-threading
#131757
gh-127405: Add `ABIFLAGS` to `sysconfig.get_config_vars()` on Windows
#131799
gh-119605: Respect `follow_wrapped` for `__init__` and `__new__` when getting class signature with `inspect.signature`
#132055
gh-130907: Treat all module-level annotations as conditional
#131550
gh-130453: pygettext: Allow specifying multiple keywords with the same function name
#131380
Segfault/abort from calling `BytesIO` `unshare_buffer` in threads on a free-threaded build
#132551
GH-131498: Allow 'peek' variables to be modified
#132506
gh-131423: Update OpenSSL data to 3.4.1 on Linux
#131618
gh-131524: Update platform CLI to use argparse
#131542
GH-114809: Add support for macOS multi-arch builds with the JIT enabled
#131751
gh-132388: Increase test coverage for HMAC
#132389
gh-131336: fix thread safety for ctypes functions
#132232
gh-132261: Store annotations at hidden internal keys in the class dict
#132345
[3.13] gh-132429: Fix support of Bluetooth sockets on NetBSD and DragonFly BSD
#132458
gh-123471: Make concurrent iteration over itertools.cycle safe under free-threading
#131212
gh-132042: Remove resolve_slotdups to speedup class creation
#132156
Multiple tests failing when invoked directly via `./python Lib/test/...`
#131290
gh-128398: improve error message when incorrectly `with` and `async with`
#132218
gh-103997: Automatically dedent the argument to "-c"
#103998
GH-123599: `url2pathname()`: handle authority section in file URL
#126844
gh-102567: Add -X importtime=2 for logging an importtime message for already-loaded modules
#118655

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Top Contributors in v3.14.0b1

serhiy-storchaka
pablogsal
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brandtbucher
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JelleZijlstra
iritkatriel

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