Still it does look the functions lited in the second comment are undocumented.

https://docs.python.org/3/search.html?q=PyClassMethodDescr_Type
https://docs.python.org/3/search.html?q=PyClassMethod_New&check_keywords=yes&area=default

However on the last function I did find 1 thing However it was not what I was looking for. What I actually was looking for was the args for the 3 functions and description on what it does and all that similar to how this function is documented:

```
PyObject* PyObject_CallObject(PyObject *callable_object, PyObject *args)
Return value: New reference.
Call a callable Python object callable_object, with arguments given by the tuple args. If no arguments are needed, then args may be NULL. Returns the result of the call on success, or NULL on failure. This is the equivalent of the Python expression callable_object(*args).

```

This is actually the reason why the issue was opened as the functions was not documented like this.