Importing modules from a neighbouring folder in Python

Question

I have put the question in the figure below:

EDIT The question put next to the figure is:

How do I make script_A1 import a function

Answer 1

You can use a trick of adding the top folder to path:

import sys
sys.path.append('..')
import folderB.something

You can also use imp.load_source if you prefer.

Answer 2

I think I solved the issue.

In the following way, you can append the parent directory to the PATH. Put this at the top of script_A1:

import sys
import os
myDir = os.path.dirname(os.path.abspath(__file__))
parentDir = os.path.split(myDir)[0]
if(sys.path.__contains__(parentDir)):
    print('parent already in path')
    pass
else:
    print('parent directory added')
    sys.path.append(parentDir)

# Now comes the rest of your script

You can verify that the parent directory myProject is indeed added to the PATH by printing out:

    print(sys.path)

Since the parent directory myProject is now part of the PATH, you can import scripts/modules/whatever from any of its subdirectories. This is how you import script_B2 from folder_B:

import folder_B.script_B2 as script_B2

After closing your application, you can verify if your Python environment is restored to its initial state. just print the PATH again and check if the directory you had appended is gone.

Answer 3

Put this at the top of script_A1;

from folderB.script_B2 import YourClass as your_class