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> So all the PyRun_*Object functions are new in 3.4, and none of them are documented yet?
Not all. Only following functions are new in 3.4:
Parser/parsetok.c:PyParser_ParseStringObject
Parser/parsetok.c:PyParser_ParseFileObject
Python/future.c:PyFuture_FromASTObject
Python/symtable.c:PySymtable_BuildObject
Python/compile.c:PyAST_CompileObject
Python/_warnings.c:PyErr_WarnExplicitObject
Python/ast.c:PyAST_FromNodeObject
Python/errors.c:PyErr_SyntaxLocationObject
Python/errors.c:PyErr_ProgramTextObject
Python/pythonrun.c:PyRun_InteractiveOneObject
Python/pythonrun.c:Py_CompileStringObject
Python/pythonrun.c:Py_SymtableStringObject
Python/pythonrun.c:PyParser_ASTFromStringObject
Python/pythonrun.c:PyParser_ASTFromFileObject
Following functions existed in 3.3:
Objects/moduleobject.c:PyModule_NewObject
Objects/moduleobject.c:PyModule_GetNameObject
Objects/moduleobject.c:PyModule_GetFilenameObject
Objects/abstract.c:PyObject_CallObject
Objects/bytesobject.c:PyBytes_FromObject
Objects/fileobject.c:PyFile_WriteObject
Objects/memoryobject.c:PyMemoryView_FromObject
Objects/longobject.c:PyLong_FromUnicodeObject
Objects/weakrefobject.c:PyWeakref_GetObject
Objects/exceptions.c:PyUnicodeEncodeError_GetObject
Objects/exceptions.c:PyUnicodeDecodeError_GetObject
Objects/exceptions.c:PyUnicodeTranslateError_GetObject
Objects/unicodeobject.c:PyUnicode_FromObject
Objects/unicodeobject.c:PyUnicode_FromEncodedObject
Objects/unicodeobject.c:PyUnicode_AsDecodedObject
Objects/unicodeobject.c:PyUnicode_AsEncodedObject
Objects/bytearrayobject.c:PyByteArray_FromObject
Python/sysmodule.c:PySys_GetObject
Python/sysmodule.c:PySys_SetObject
Python/errors.c:PyErr_SetObject
Python/errors.c:PyErr_SetFromErrnoWithFilenameObject
Python/import.c:_PyImport_FixupExtensionObject
Python/import.c:_PyImport_FindExtensionObject
Python/import.c:PyImport_AddModuleObject
Python/import.c:PyImport_ExecCodeModuleObject
Python/import.c:PyImport_ImportFrozenModuleObject
Python/import.c:PyImport_ImportModuleLevelObject
Python/modsupport.c:PyModule_AddObject
Python/pyarena.c:PyArena_AddPyObject