It is common (more than 30 cases) in the C code to access a function or a variable from other module. For example:

functools=PyImport_ImportModule("functools");if (!functools)        gotoerror;st->partial=PyObject_GetAttrString(functools,"partial");Py_CLEAR(functools);

I propose to add a private helper function which combinesPyImport_ImportModule() andPyObject_GetAttrString().

st->partial=_PyImport_GetModuleAttrString("functools","partial");

It will save 4-6 lines of code and a variable on every use.