cpython/Modules/_testlimitedcapi/codec.c

#include "pyconfig.h"   // Py_GIL_DISABLED

// Need limited C API version 3.5 for PyCodec_NameReplaceErrors()
#if !defined(Py_GIL_DISABLED) && !defined(Py_LIMITED_API)
#define Py_LIMITED_API …
#endif

#include "parts.h"

static PyObject *
codec_namereplace_errors(PyObject *Py_UNUSED(module), PyObject *exc)
{ … }

static PyMethodDef test_methods[] = …;

int
_PyTestLimitedCAPI_Init_Codec(PyObject *module)
{ … }