OT - iglob is the iterator version of glob. perhaps in python 2 this should have been called "xglob". In python 3 it should have been just "glob".

>>> rglob('**.py')

or

>>> glob('**.py', True)

I don't mind either, though I think the first one is a bit clearer because "r" is more telling than "True". Don't mention glob('**.py', allow_recursive=True) because that's probably not going to be the norm.