Pending Removal in Python 3.14

* The ``ma_version_tag`` field in :c:type:`PyDictObject` for extension modules

(:pep:`699`; :gh:`101193`).

* Creating :c:data:`immutable types <Py_TPFLAGS_IMMUTABLETYPE>` with mutable

bases (:gh:`95388`).

* Functions to configure Python's initialization, deprecated in Python 3.11:

* ``PySys_SetArgvEx()``: set :c:member:`PyConfig.argv` instead.

* ``PySys_SetArgv()``: set :c:member:`PyConfig.argv` instead.

* ``Py_SetProgramName()``: set :c:member:`PyConfig.program_name` instead.

* ``Py_SetPythonHome()``: set :c:member:`PyConfig.home` instead.

The :c:func:`Py_InitializeFromConfig` API should be used with

:c:type:`PyConfig` instead.

* Global configuration variables:

* :c:var:`Py_DebugFlag`: use :c:member:`PyConfig.parser_debug` instead.

* :c:var:`Py_VerboseFlag`: use :c:member:`PyConfig.verbose` instead.

* :c:var:`Py_QuietFlag`: use :c:member:`PyConfig.quiet` instead.

* :c:var:`Py_InteractiveFlag`: use :c:member:`PyConfig.interactive` instead.

* :c:var:`Py_InspectFlag`: use :c:member:`PyConfig.inspect` instead.

* :c:var:`Py_OptimizeFlag`: use :c:member:`PyConfig.optimization_level` instead.

* :c:var:`Py_NoSiteFlag`: use :c:member:`PyConfig.site_import` instead.

* :c:var:`Py_BytesWarningFlag`: use :c:member:`PyConfig.bytes_warning` instead.

* :c:var:`Py_FrozenFlag`: use :c:member:`PyConfig.pathconfig_warnings` instead.

* :c:var:`Py_IgnoreEnvironmentFlag`: use :c:member:`PyConfig.use_environment` instead.

* :c:var:`Py_DontWriteBytecodeFlag`: use :c:member:`PyConfig.write_bytecode` instead.

* :c:var:`Py_NoUserSiteDirectory`: use :c:member:`PyConfig.user_site_directory` instead.

* :c:var:`Py_UnbufferedStdioFlag`: use :c:member:`PyConfig.buffered_stdio` instead.

* :c:var:`Py_HashRandomizationFlag`: use :c:member:`PyConfig.use_hash_seed`

and :c:member:`PyConfig.hash_seed` instead.

* :c:var:`Py_IsolatedFlag`: use :c:member:`PyConfig.isolated` instead.

* :c:var:`Py_LegacyWindowsFSEncodingFlag`: use :c:member:`PyPreConfig.legacy_windows_fs_encoding` instead.

* :c:var:`Py_LegacyWindowsStdioFlag`: use :c:member:`PyConfig.legacy_windows_stdio` instead.

* :c:var:`!Py_FileSystemDefaultEncoding`: use :c:member:`PyConfig.filesystem_encoding` instead.

* :c:var:`!Py_HasFileSystemDefaultEncoding`: use :c:member:`PyConfig.filesystem_encoding` instead.

* :c:var:`!Py_FileSystemDefaultEncodeErrors`: use :c:member:`PyConfig.filesystem_errors` instead.

* :c:var:`!Py_UTF8Mode`: use :c:member:`PyPreConfig.utf8_mode` instead. (see :c:func:`Py_PreInitialize`)

The :c:func:`Py_InitializeFromConfig` API should be used with

:c:type:`PyConfig` instead.

Pending Removal in Python 3.15

* The bundled copy of ``libmpdecimal``.

* :c:func:`PyImport_ImportModuleNoBlock`: use :c:func:`PyImport_ImportModule` instead.

* :c:func:`PyWeakref_GET_OBJECT`: use :c:func:`!PyWeakref_GetRef` instead.

* :c:func:`PyWeakref_GetObject`: use :c:func:`!PyWeakref_GetRef` instead.

* :c:type:`!Py_UNICODE_WIDE` type: use :c:type:`wchar_t` instead.

* :c:type:`Py_UNICODE` type: use :c:type:`wchar_t` instead.

* Python initialization functions:

* :c:func:`PySys_ResetWarnOptions`: clear :data:`sys.warnoptions` and

:data:`!warnings.filters` instead.

* :c:func:`Py_GetExecPrefix`: get :data:`sys.exec_prefix` instead.

* :c:func:`Py_GetPath`: get :data:`sys.path` instead.

* :c:func:`Py_GetPrefix`: get :data:`sys.prefix` instead.

* :c:func:`Py_GetProgramFullPath`: get :data:`sys.executable` instead.

* :c:func:`Py_GetProgramName`: get :data:`sys.executable` instead.

* :c:func:`Py_GetPythonHome`: get :c:member:`PyConfig.home` or

the :envvar:`PYTHONHOME` environment variable instead.

Pending Removal in Future Versions

The following APIs are deprecated and will be removed,

although there is currently no date scheduled for their removal.

* :c:macro:`Py_TPFLAGS_HAVE_FINALIZE`: unneeded since Python 3.8.

* :c:func:`PyErr_Fetch`: use :c:func:`PyErr_GetRaisedException` instead.

* :c:func:`PyErr_NormalizeException`: use :c:func:`PyErr_GetRaisedException` instead.

* :c:func:`PyErr_Restore`: use :c:func:`PyErr_SetRaisedException` instead.

* :c:func:`PyModule_GetFilename`: use :c:func:`PyModule_GetFilenameObject` instead.

* :c:func:`PyOS_AfterFork`: use :c:func:`PyOS_AfterFork_Child` instead.

* :c:func:`PySlice_GetIndicesEx`: use :c:func:`PySlice_Unpack` and :c:func:`PySlice_AdjustIndices` instead.

* :c:func:`!PyUnicode_AsDecodedObject`: use :c:func:`PyCodec_Decode` instead.

* :c:func:`!PyUnicode_AsDecodedUnicode`: use :c:func:`PyCodec_Decode` instead.

* :c:func:`!PyUnicode_AsEncodedObject`: use :c:func:`PyCodec_Encode` instead.

* :c:func:`!PyUnicode_AsEncodedUnicode`: use :c:func:`PyCodec_Encode` instead.

* :c:func:`PyUnicode_READY`: unneeded since Python 3.12

* :c:func:`!PyErr_Display`: use :c:func:`PyErr_DisplayException` instead.

* :c:func:`!_PyErr_ChainExceptions`: use ``_PyErr_ChainExceptions1`` instead.

* :c:member:`!PyBytesObject.ob_shash` member:

call :c:func:`PyObject_Hash` instead.

* :c:member:`!PyDictObject.ma_version_tag` member.

* Thread Local Storage (TLS) API:

* :c:func:`PyThread_create_key`: use :c:func:`PyThread_tss_alloc` instead.

* :c:func:`PyThread_delete_key`: use :c:func:`PyThread_tss_free` instead.

* :c:func:`PyThread_set_key_value`: use :c:func:`PyThread_tss_set` instead.

* :c:func:`PyThread_get_key_value`: use :c:func:`PyThread_tss_get` instead.

* :c:func:`PyThread_delete_key_value`: use :c:func:`PyThread_tss_delete` instead.

* :c:func:`PyThread_ReInitTLS`: unneeded since Python 3.7.

C API Deprecations

.. include:: c-api-pending-removal-in-3.14.rst

.. include:: c-api-pending-removal-in-3.15.rst

.. include:: c-api-pending-removal-in-future.rst

.. include:: ../deprecations/c-api-pending-removal-in-3.14.rst

.. include:: ../deprecations/c-api-pending-removal-in-future.rst