http://bugs.python.org/review/16731/diff/6854/Modules/xxlimited.c File Modules/xxlimited.c (right): http://bugs.python.org/review/16731/diff/6854/Modules/xxlimited.c#newcode15 Modules/xxlimited.c:15: This example uses the Py_LIMITED_API API. See xxlimited.c for a version I think there is a typo here: s/xxlimited.c/xxmodule.c/ (or maybe better named Modules/xxmodule.c) http://bugs.python.org/review/16731/