Feature or enhancement

Currently, Argument Clinic will not allow parameters named module, even though they've got a custom C name. For example, this clinic input is rejected:

/*[clinic input] mod.func   module as mod: object  [clinic start generated code]*/

AC complains with "You can't have two parameters named 'module'!", even though there is no naming collision on the C level. This issue prevents AC conversion of some functions and methods in the code base, for example warn_explicit() in Python/_warnings.c. A workaround is to provide a custom name to the self converter, however I view that as a hack; it adds unneeded clinic code.

/*[clinic input] mod.func   _module: self(type="PyObject *")  module as mod: object  [clinic start generated code]*/

Pitch

The fix is easy (its almost a one-liner), and it unlocks more AC conversions, without requiring unneeded hacks.