Question

I have following folder structure:

root
   folder1
       file1.py
       file2.py
   folder2
       file3.py

How would the import of file1.py look like, if I want to import it in file3.py?
I tried different variants: from folder1.file1 import *, from .folder1.file1 import *, from folder1 import file1, and similar variations, unfortunately without success. Do I need to create an __init__.py file somewhere?

Answer 1

yes __init__.py should be present in root, folder1 and folder2

The __init__.py files are required to make Python treat the directories as containing packages, they just be an empty file

then you can do

from folder1 import file1

if a package’s __init__.py code defines a list named __all__, it is taken to be the list of module names that should be imported when from package import * is encountered