In Python, when we do import modulename, is there any material difference between
- a file
modulename.py - a directory with the same contents in
modulename/__init__.py?
Concretely: consider a file m.py containing s = "hello":
>>> import m
>>> m.s
'hello'
If instead we have a directory m with a file __init__.py containing the same s = "hello", we get the identical result.
Obviously the value of __file__ is different during execution, and the directory structure can have submodules.
Are there any other differences at all? With any variant of import (from/as/etc) ?
I’m really only concerned with Python 3, but version-specific details also welcomed for historic interest.
