Does Python import all modules in a module path?

Question

Let's assume I have the following structure.

main.py
 /mod1
 __init__.py
 mod1.py
 /mod2
 __init__.py
 mod2.py

And I have the following line in main.py.

import mod1.mod2

In this case does mod1 also get imported?

• Bakuriu: Note that __init__.py files need not be empty. If they aren't empty they are executed during importing. This means that mod1 must be imported in your case because mod1/__init__.py could setup some resource or stuff like that required by (e.g.) mod2. Also modules have reeferences to their packages, so the parent modules must be imported for the references to exist.

Answer 1

Yes; mod1 is imported as well, and you can access mod1 solely as mod1 within your code if you do not write an alias like this import mod1.mod2 as mod2.

Python needs to import the modules consecutively so that it is able to import last module. You can test this by putting print statements in your __init__.py files

Answer 2

Yes. Try this in the interpreter:

import os.path
dir
os

As this shows, os is present in the main namespace.