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C-API tracking: missing Stable ABI functions in crates/capi #8156
Track CPython Stable ABI C-API functions that are still missing from RustPython crates/capi, organized by CPython Include/ header layout (mirroring RustPython’s capi split, including abstract_/*).
Missing Stable ABI Functions by Header
Derived from CPython Misc/stable_abi.toml and compared against exported C-API functions in RustPython crates/capi/src.
This list includes only functions that are still candidates for implementation in RustPython C-API:
starts from all [function.*] entries in Misc/stable_abi.toml
removes private functions (names starting with _)
removes functions already implemented in RustPython crates/capi/src
removes functions marked removed in CPython "What's New" C-API notes across Python 3.0 through 3.15
marks remaining deprecated or soft-deprecated functions as (deprecated)
groups remaining functions by CPython Include/*.h header, using RustPython's existing crates/capi/src file split (including abstract_/*)
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Latest update: 2026-10-07
Goal
Track CPython Stable ABI C-API functions that are still missing from RustPython
crates/capi, organized by CPythonInclude/header layout (mirroring RustPython’s capi split, includingabstract_/*).Missing Stable ABI Functions by Header
Derived from CPython
Misc/stable_abi.tomland compared against exported C-API functions in RustPythoncrates/capi/src.This list includes only functions that are still candidates for implementation in RustPython C-API:
[function.*]entries inMisc/stable_abi.toml_)crates/capi/src(deprecated)Include/*.hheader, using RustPython's existingcrates/capi/srcfile split (includingabstract_/*)Total missing: 245
Include/abstract.h -> crates/capi/src/abstract_.rs(3)PyObject_CallFunctionPyObject_CallMethodPyVectorcall_NARGSInclude/abstract.h -> crates/capi/src/abstract_/number.rs(1)PyNumber_ToBaseInclude/abstract.h -> crates/capi/src/abstract_/sequence.rs(1)PySequence_FastInclude/audit.h(2)PySys_AuditPySys_AuditTupleInclude/bytearrayobject.h(1)PyByteArray_ConcatInclude/bytesobject.h(6)PyBytes_ConcatPyBytes_ConcatAndDelPyBytes_DecodeEscapePyBytes_FromFormatPyBytes_FromFormatVPyBytes_ReprInclude/ceval.h(7)PyEval_EvalCodeExPyEval_GetFuncNamePyEval_ReleaseThreadPy_AddPendingCallPy_GetRecursionLimitPy_MakePendingCallsPy_SetRecursionLimitInclude/descrobject.h(2)PyMember_GetOne(deprecated)PyMember_SetOne(deprecated)Include/fileobject.h(5)PyFile_FromFdPyFile_GetLinePyFile_WriteObjectPyFile_WriteStringPyObject_AsFileDescriptorInclude/fileutils.h(2)Py_DecodeLocale(deprecated)Py_EncodeLocale(deprecated)Include/import.h(17)PyImport_AddModulePyImport_AddModuleObjectPyImport_AppendInittabPyImport_ExecCodeModulePyImport_ExecCodeModuleObjectPyImport_ExecCodeModuleWithPathnamesPyImport_GetImporterPyImport_GetMagicNumberPyImport_GetMagicTagPyImport_GetModule(deprecated)PyImport_GetModuleDictPyImport_ImportFrozenModulePyImport_ImportFrozenModuleObjectPyImport_ImportModule(deprecated)PyImport_ImportModuleLevelPyImport_ImportModuleLevelObjectPyImport_ReloadModuleInclude/intrcheck.h(5)PyOS_AfterFork(deprecated)PyOS_AfterFork_Child(deprecated)PyOS_AfterFork_Parent(deprecated)PyOS_BeforeFork(deprecated)PyOS_InterruptOccurredInclude/listobject.h(1)PyList_GetItemInclude/longobject.h(5)PyLong_AsLongAndOverflowPyLong_AsLongLongAndOverflowPyLong_GetInfoPyOS_strtolPyOS_strtoulInclude/memoryobject.h(3)PyMemoryView_FromBufferPyMemoryView_FromMemoryPyMemoryView_GetContiguousInclude/methodobject.h(3)PyCFunction_GetFlagsPyCFunction_GetFunctionPyCFunction_GetSelfInclude/modsupport.h(15)PyArg_ParsePyArg_ParseTuple(deprecated)PyArg_ParseTupleAndKeywordsPyArg_UnpackTuplePyArg_VaParsePyArg_VaParseTupleAndKeywordsPyArg_ValidateKeywordArgumentsPyModule_Add(deprecated)PyModule_AddFunctionsPyModule_Create2PyModule_ExecDef(deprecated)PyModule_FromDefAndSpec2(deprecated)PyModule_SetDocStringPy_BuildValuePy_VaBuildValueInclude/moduleobject.h(9)PyModuleDef_InitPyModule_GetDefPyModule_GetFilenamePyModule_GetNamePyModule_GetStatePyModule_GetStateSizePyModule_GetState_DuringGCPyModule_GetTokenPyModule_GetToken_DuringGCInclude/object.h(21)PyType_ClearCachePyType_FromMetaclass(deprecated)PyType_FromModuleAndSpec(deprecated)PyType_FromSpec(deprecated)PyType_FromSpecWithBases(deprecated)PyType_GenericAllocPyType_GenericNewPyType_GetBaseByTokenPyType_GetBaseByToken_DuringGCPyType_GetModulePyType_GetModuleByDefPyType_GetModuleByTokenPyType_GetModuleByToken_DuringGCPyType_GetModuleStatePyType_GetModuleState_DuringGCPyType_GetModule_DuringGCPyType_GetTypeDataSizePyType_ModifiedPyType_ReadyPy_SET_SIZEPy_SIZEInclude/objimpl.h(3)PyObject_GC_DelPyObject_InitPyObject_InitVarInclude/pybuffer.h(5)PyBuffer_FillContiguousStridesPyBuffer_FillInfoPyBuffer_SizeFromFormatPyObject_CheckBufferPyObject_CopyDataInclude/pycapsule.h(3)PyCapsule_GetDestructorPyCapsule_SetDestructorPyCapsule_SetNameInclude/pyerrors.h(11)PyErr_FormatPyErr_FormatVPyErr_NormalizeExceptionPyErr_ProgramTextPyErr_SetImportErrorPyErr_SetImportErrorSubclassPyErr_SyntaxLocationPyErr_SyntaxLocationExPyExceptionClass_NamePyOS_snprintfPyOS_vsnprintfInclude/pylifecycle.h(10)PyOS_getsigPyOS_setsigPy_AtExitPy_BytesMainPy_EndInterpreterPy_ExitPy_MainPy_NewInterpreterPy_SetProgramNamePy_SetPythonHomeInclude/pystate.h(27)PyGILState_GetThisThreadStatePyInterpreterGuard_ClosePyInterpreterGuard_FromCurrentPyInterpreterGuard_FromViewPyInterpreterState_ClearPyInterpreterState_DeletePyInterpreterState_GetDictPyInterpreterState_NewPyInterpreterView_ClosePyInterpreterView_FromCurrentPyInterpreterView_FromMainPyState_AddModulePyState_FindModulePyState_RemoveModulePyThreadState_ClearPyThreadState_DeletePyThreadState_EnsurePyThreadState_EnsureFromViewPyThreadState_GetPyThreadState_GetDictPyThreadState_GetFramePyThreadState_GetIDPyThreadState_GetInterpreterPyThreadState_NewPyThreadState_ReleasePyThreadState_SetAsyncExc(deprecated)PyThreadState_SwapInclude/pystrtod.h(2)PyOS_double_to_stringPyOS_string_to_doubleInclude/pythonrun.h(3)PyErr_Display(deprecated)PyErr_PrintPyOS_CheckStackInclude/pythread.h(8)PyThread_GetInfoPyThread_tss_allocPyThread_tss_createPyThread_tss_deletePyThread_tss_freePyThread_tss_getPyThread_tss_is_createdPyThread_tss_setInclude/sliceobject.h(2)PySlice_GetIndicesPySlice_GetIndicesEx(deprecated)Include/structseq.h(4)PyStructSequence_GetItemPyStructSequence_NewPyStructSequence_NewTypePyStructSequence_SetItemInclude/sysmodule.h(13)PySys_FormatStderrPySys_FormatStdoutPySys_GetAttrPySys_GetAttrStringPySys_GetObjectPySys_GetOptionalAttrPySys_GetOptionalAttrStringPySys_GetXOptionsPySys_SetArgvPySys_SetArgvExPySys_SetObjectPySys_WriteStderrPySys_WriteStdoutInclude/traceback.h(1)PyTraceBack_HereInclude/unicodeobject.h(42)PyUnicode_AppendPyUnicode_AppendAndDelPyUnicode_AsCharmapStringPyUnicode_AsMBCSStringPyUnicode_AsUCS4PyUnicode_AsUCS4CopyPyUnicode_AsWideCharPyUnicode_AsWideCharString(deprecated)PyUnicode_BuildEncodingMapPyUnicode_CountPyUnicode_DecodeCharmapPyUnicode_DecodeCodePageStatefulPyUnicode_DecodeLocalePyUnicode_DecodeLocaleAndSize(deprecated)PyUnicode_DecodeMBCSPyUnicode_DecodeMBCSStatefulPyUnicode_DecodeUTF16PyUnicode_DecodeUTF16StatefulPyUnicode_DecodeUTF32PyUnicode_DecodeUTF32StatefulPyUnicode_DecodeUTF7StatefulPyUnicode_DecodeUTF8StatefulPyUnicode_EncodeCodePagePyUnicode_EncodeLocale(deprecated)PyUnicode_FSConverterPyUnicode_FSDecoderPyUnicode_FindPyUnicode_FindChar(deprecated)PyUnicode_FromFormatPyUnicode_FromFormatVPyUnicode_FromWideCharPyUnicode_Join(deprecated)PyUnicode_RSplitPyUnicode_ReadCharPyUnicode_ReplacePyUnicode_ResizePyUnicode_RichComparePyUnicode_SplitPyUnicode_SplitlinesPyUnicode_SubstringPyUnicode_TailmatchPyUnicode_WriteCharInclude/warnings.h(2)PyErr_ResourceWarningPyErr_WarnFormat