Functions added to a limited API after 3.2 should be available only when Py_LIMITED_API is not defined or is set to corresponding hexadecimal Python version (e.g. 0x03050000).

Proposed patch makes following names available only for corresponding versions of a limited API.

Removed declaration: PyErr_SetExcWithArgsKwargs().

Excluded from stable ABI: _PyBytes_DecodeEscape(), PyInit_imp().

3.3: Py_hexdigits, PyImport_ExecCodeModuleObject(), PyImport_AddModuleObject(), PyImport_ImportFrozenModuleObject(), PyMemoryView_FromMemory(), PyModule_NewObject(), PyModule_GetNameObject(), PyObject_GenericSetDict(), PyErr_GetExcInfo(), PyErr_SetExcInfo(), PyErr_SetImportError(), PyParser_SimpleParseStringFlagsFilename(), PyThread_GetInfo(), PyUnicode_Substring(), PyUnicode_AsUCS4(), PyUnicode_AsUCS4Copy(), PyUnicode_GetLength(), PyUnicode_ReadChar(), PyUnicode_WriteChar(), PyUnicode_DecodeCodePageStateful(), PyUnicode_EncodeCodePage(), PyUnicode_DecodeLocaleAndSize(), PyUnicode_DecodeLocale(), PyUnicode_EncodeLocale(), PyUnicode_FindChar(), and a number of OSError subclasses.

3.4: PyErr_SetFromErrnoWithFilenameObjects(), PyErr_SetExcFromWindowsErrWithFilenameObjects().

3.5: PyNumber_MatrixMultiply(), PyNumber_InPlaceMatrixMultiply(), PyCodec_NameReplaceErrors(), Py_DecodeLocale(), Py_EncodeLocale(), PyImport_ImportModuleLevelObject(), PyObject_Calloc(), PyExc_StopAsyncIteration, PyExc_RecursionError, PyMem_Calloc(), 
a number of PyODict_* macros.

3.6: Py_FileSystemDefaultEncodeErrors, PyOS_FSPath(), PyExc_ModuleNotFoundError, PyErr_SetImportErrorSubclass(), PyErr_ResourceWarning().

However it may be better that some was added to stable ABI by mistake. Py_hexdigits looks as a stuff for internal use, PyThread_GetInfo() and PyODict_* macros are not documented.