Importing files in different directories in Python

Question

I have a directory structure like this:

dir/
   frontend.py
   dir1/main.py
   dir2/backend.py

Have tried all the answers on Stackoverflow. Nothing seems to work.

Answer 1

In any folder from which you want to import source files you need to have existing init .py file.

I would advise structure like:

dir/
   main.py
   dir1/frontend.py
   dir1/__init__.py
   dir2/backend.py
   dir2/__init__.py

Then you import them in following fashion (in main.py):

import dir1.frontend
import dir2.backend

Answer 2

There is only one rule when it comes to importing files in a Python project.

You have to import the package relative to the directory from where the project is run.

For example in the question main.py should have something like this:

from dir.frontend import *
from dir.dir2.backend import *

But then you'll have to have something like main.py under dir/ which imports dir/dir1/main.py and then run python main.py .

So, try to keep the main.py always in the head directory so you don't have to worry about such a situation as above.

ONLY ONE RULE: Everything has to be imported relatively to the directory from where the project is run.