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Cpython v3.12.0b2

Cpython: v3.12.0b2 Release

Release date:
June 6, 2023
Previous version:
v3.12.0b1 (released October 31, 2025)
Magnitude:
9,068 Diff Delta
Contributors:
16 total committers
Data confidence:
Commits:
115 impacting commits

87 Features Released with v3.12.0b2

[3.12] gh-104799: Default missing lists in AST to the empty list (GH-104834)
#105213
[3.12] gh-103142: Upgrade binary builds and CI to OpenSSL 1.1.1u (GH-105174)
#105199
[3.12] gh-105035: fix super() calls on unusual types (e.g. meta-types) (GH-105094)
#105117
[3.12] gh-105069: Add a readline-like callable to the tokenizer to consume input iteratively (GH-105070)
#105119
[3.12] gh-99108: Refresh HACL* (GH-104808)
#104893
[3.12] gh-104799: Move location of type_params AST fields (GH-104828)
#104974
[3.12] gh-103921: Document PEP 695 (GH-104642)
#104989
[3.12] gh-105144: Runtime-checkable protocols: move all 'sanity checks' to `_ProtocolMeta.__subclasscheck__` (GH-105152)
#105160
[3.12] gh-104976: Ensure trailing dedent tokens are emitted as the previous tokenizer (GH-104980)
#105000
[3.12] gh-99108: Release the GIL around hashlib built-in computation (GH-104675)
#104776
[3.12] gh-105164: Detect annotations inside match blocks (GH-105177)
#105313
[3.12] gh-98963: Restore the ability to have a dict-less property. (GH-105262)
#105297
[3.12] GH-105162: Account for `INSTRUMENTED_RESUME` in gen.close/throw. (GH-105187)
#105378
[3.12] gh-104719: IDLE - test existence of all tokenize references. (GH-104767)
#104844
[3.12] gh-104879: Fix TypeAliasType.__module__ in exec() (GH-104881)
#104890
[3.12] gh-105042: Disable unmatched parens syntax error in python tokenize (GH-105061)
#105120
[3.12] gh-104399: Use newer libtommath APIs when necessary (GH-104407)
#105343
[3.12] gh-89886: Rely on HAVE_SYS_TIME_H (GH-105058)
#105192
[3.12] gh-104690 Disallow thread creation and fork at interpreter finalization (GH-104826)
#105277
[3.12] gh-105237: Allow calling `issubclass(X, typing.Protocol)` again (GH-105239)
#105316
[3.12] gh-104935: typing: Fix interactions between `@runtime_checkable` and `Generic` (GH-104939)
#104941
[3.12] gh-105280: Ensure `isinstance([], collections.abc.Mapping)` always evaluates to `False` (GH-105281)
#105318
[3.12] gh-105071: add PyUnstable_Exc_PrepReraiseStar to expose except* implementation in the unstable API (GH-105072)
#105095
[3.12] gh-105194: Fix format specifier escaped characters in f-strings (GH-105231)
#105234
[3.12] gh-104972: Ensure that line attributes in tokens in the tokenize module are correct (GH-104975)
#104982
[3.12] gh-105080: Fixed inconsistent signature on derived classes (GH-105217)
#105257
[3.12] gh-103295: fix stack overwrite on 32-bit in perf map test harness (GH-104811)
#104823
[3.12] gh-104866: Tokenize should emit NEWLINE after exiting block with comment (GH-104870)
#104872
[3.12] Improve test coverage for is_typeddict (GH-104884)
#104889
[3.12] gh-102251: Explicitly free state for test modules with state in test_import (GH-105085)
#105170

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Top Contributors in v3.12.0b2

miss-islington
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