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[C API] Deprecate private functions which have a public replacement · Issue #128863 · python/cpython · GitHub

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[C API] Deprecate private functions which have a public replacement #128863

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[C API] Deprecate private functions which have a public replacement#128863
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topic-C-APItype-featureA feature request or enhancement

Description

vstinner
opened on Jan 15, 2025

Hi,

Python 3.13 and 3.14 added public functions to replace private functions. For example, a public function PyBytes_Join() was added to replace the private function _PyBytes_Join().

I propose to deprecate the private functions which have a public replacement, and remove them in Python 3.16.

Victor

Linked PRs

Activity

  1. vstinner
    added
    topic-C-API
    on Jan 15, 2025
  2. vstinner
    added 2 commits that reference this issue on Jan 15, 2025

    pythongh-128863: Deprecate private C API functions

    873d8bd

    pythongh-128863: Deprecate private C API functions

    814670d

  3. vstinner commented on Jan 15, 2025

    vstinner
    on Jan 15, 2025
    MemberAuthor

    Previous discussion: https://discuss.python.org/t/remove-again-private-apis-which-now-have-new-public-replacement/68081

  4. vstinner
    added 3 commits that reference this issue on Jan 15, 2025

    pythongh-128863: Deprecate private C API functions

    37869e2

    pythongh-128863: Deprecate private C API functions

    18f8581

    pythongh-128863: Deprecate private C API functions

    8140437

  5. vstinner commented on Jan 16, 2025

    vstinner
    on Jan 16, 2025
    MemberAuthor

    Other deprecations to consider:

    • _PyCode_GetExtra(): PyUnstable_Code_GetExtra()
    • _PyCode_SetExtra(): PyUnstable_Code_SetExtra()
    • _PyEval_RequestCodeExtraIndex(): PyUnstable_Eval_RequestCodeExtraIndex()
    • _PyLong_AsByteArray(): PyLong_AsNativeBytes()
    • _PyLong_FromByteArray(): PyLong_FromNativeBytes()
    • _PyLong_FromDigits(): PyLongWriter_Create()
    • _PyLong_New(): PyLongWriter_Create()
    • _PyLong_Sign(): PyLong_GetSign()
    • _PyUnicodeWriter_Init(): PyUnicodeWriter_Create() (and other _PyUnicodeWriter functions)
  6. picnixz
    added
    type-featureA feature request or enhancement
    on Jan 17, 2025
  7. vstinner
    added 3 commits that reference this issue on Jan 22, 2025

    gh-128863: Deprecate private C API functions (#128864)

    9012fa7

    pythongh-128863: Deprecate _PyLong_Sign() function

    be36fc8

    gh-128863: Deprecate _PyLong_Sign() function (#129176)

    1d485db

  8. skirpichev commented on Jan 23, 2025

    skirpichev
    on Jan 23, 2025
    Member

    I'm closing #127937 and #127936 in favor of this issue.

  9. skirpichev
    added a commit that references this issue on Jan 23, 2025

    pythongh-128863: deprecate _PyLong_New() function

    2d4b969
  10. vstinner
    added 3 commits that reference this issue on Jan 23, 2025

    gh-128863: Deprecate _PyLong_New() function (#129212)

    5c9a63f

    pythongh-128863: Deprecate the private _PyUnicodeWriter API

    e1fd675

    gh-128863: Deprecate _PyLong_FromDigits() function (#127939)

    233fd00
  11. vstinner
    added a commit that references this issue on Feb 20, 2025

    gh-128863: Deprecate the private _PyUnicodeWriter API (#129245)

    519c2c6
  12. vstinner
    closed this as completedon Mar 13, 2025
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