Hi Raymond, would updating the attached PR to change https://github.com/remilapeyre/cpython/blob/7c78350f8903f162e5f70ee147c0e97cb1ed5181/Lib/cmd.py#L270 (and others) from `compfunc = getattr(self, 'complete_' + cmd)` to `compfunc = getattr(self.__class__, 'complete_' + cmd)` to have a consistent behavior for the help and the complection ?

Maybe the methods could all rely on `get_names` that return `dir(self.__class__)`, that way, the behavior would be more consistent and Błażej could override this method only to get its desired result.