Properly import from sub/parent folders?

[oclmedyb]

Hello,

I want to organize my project in different folders.
Currently everything is in one folder but this is getting messy really fast.

This is what I want:

-- Project/
---- Python/
------ main.py
------ Modules/
-------- module1.py
-------- Classes/
---------- class1.py
---------- class2.py


in module1.py I want to import class1.py
in main.py I want to import module1.py

I want to run main.py but I also want to run module1.py individually via CLI.

I searched a lot and found many things like adding empty __init__.py files to every folder or import with "." or ".." (which should be relative imports if I understand correctly). But nothing really works.

Either main.py works but then I can't run module1 indiviually, or vice versa...

Is what I want even possible? Does it even make sense?
How could I achieve the above?

Thank you in advance!

edit: I put the following in module1.py and it works now.
But I am not sure if this is a proper solution. I've never seen imports like this before...

if __name__ == '__main__':
    from Classes.class1 import *
    from Classes.class2 import *
else:
    from .Classes.class1 import *
    from .Classes.class2 import *