ModuleNotFoundError from Subfolders

Question

I usually assume that a similar answer is available on the internet, so please direct me if so. I have been searching for several hours, so decided to ask the community.

I am new to testing and attempting to set up a structure as follows (in a Windows env):

-parentFolder
  -__init__.py
  -src
    -__init__.py
    -fileA.py
    -fileB.py
  -test
    -__init__.py
    -test_fileA.py

Answer I followed

FileA contents:

import fileB

# do something

test_fileA contents (just trying to get imports working first):

import sys
sys.path.append('..')
from src import fileA

if __name__ == "__main__":
    print('success')

The code I am running/error I am receiving back is

C:\parentFolder >> python -m tests.test_fileA

...
File "C:\parentFolder\src\fileA.py", line 14, in <module>
    import fileB
ModuleNotFoundError: No module named 'fileB'

I am guessing that this has to do with relative paths? I was able to work around using from . import fileB but this feels hacky. What would the proper solution be?

Check if the current working directory is set to the right path. If you are running from the parent folder then it should be `from src import fileB` — Arun Sg, Jun 02 '21 at 16:24
So will all files that call each other in the folder require the append there? Running python fileA.py runs fine from my command line. — Alex D, Jun 02 '21 at 16:42

score 0 · Answer 1 · answered Jun 02 '21 at 20:13

import src.fileB

should work if you really dont want to use a relative path, but as far as I can tell using import .fileB has no disadvantages.

If you want to read more about importing stuff I would suggest this post: https://stackoverflow.com/a/16985066/15906059

ModuleNotFoundError from Subfolders

1 Answers1