How to import modules from a python directory set up like this?

Question

I have a Python directory like this, and I am trying to import classes from main_script.py.

 - main_folder
   - main_script.py
 - resources
   - package_folder
     - class_files
       - class1.py
       - class2.py
       - class3.py
       - __init__.py

This is what I tried

sys.path.append('../resources/package_folder)
from class_files import *

But I get this error, "No module named 'class_files'"

You are using a relative path, and it will be relative to your process's current working directory, not necessarily where the main_script.py is located. — alani
– alani, Commented Aug 5, 2020 at 13:01
So how would I find that? I did print sys.path but I got a bunch of things, hard to pinpoint what the working directory is. — thewhitetie
– thewhitetie, Commented Aug 5, 2020 at 13:04
Edit: Yeah so I did print(os.getcwd()) and it says the working directory is where main_script.py is — thewhitetie
– thewhitetie, Commented Aug 5, 2020 at 13:10

alani · Accepted Answer · 2020-08-05 13:11:24Z

1

You have a relative path in your sys.path which is relative to the process's current directory rather than the location of the main_script.py script itself.

You can use instead:

import sys
import os

sys.path.append(os.path.join(os.path.dirname(__file__),
                             '../resources/package_folder'))

from class_files import *

or if you prefer:

sys.path.append(os.path.join(os.path.dirname(os.path.dirname(__file__)),
                             'resources/package_folder'))

Separately, you might also find that in your __init__.py you need:

__all__ = ['class1', 'class2', 'class3']

answered Aug 5, 2020 at 13:11

alani

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