python import from sibling folder

Question

I am trying to import a module from a python file that is in a sibling folder. I read several similar questions here and tried to apply solutions listed there, but I wasn't able to solve the problem.

The structure is as follows:

parentfolder/gfolder/codefolder/fileA.py parentfolder/gfolder/utilfolder/util.py

gfolder, codefolder and utilfolder all have an __init__.py.

I'm trying to do in fileA.py:

import gfolder.utilfolder.util as util

I also tried adding before the import statement:

sys.path.append(".../parentfolder/")

And that didn't work either:

import gfolder.utilfolder.util as util ModuleNotFoundError: No module named 'gfolder'

The solution in a similar question says to include __init.py__ in the directories, which I already have.

EDIT: Now both sys.append and sys.insert work and the problem was that I included a slash at the end of the path. When I took it out, everything worked.

Possible duplicate of Python import module from sibling folder — Tzomas
– Tzomas, Commented Feb 8, 2018 at 17:08
I doubt that including or omitting a slash at the end of the path makes any difference. — mkrieger1
– mkrieger1, Commented May 3 at 11:29

shahaf · Accepted Answer · 2018-02-08 17:03:43Z

As Andrew Cox answerd int the following thread Import a module from a relative path

You can add the subdirectory to your Python path so that it imports as a normal script

import sys sys.path.insert(0, <path to gfolder>) import gfolder

you can also add the directory to the PATH var of the Linux system (I use it while I'm working on a project, at the end i modified the PATH to it's origin value)

if you maintain the following structre than it is working out side the box

parentfolder/gfolder/codefolder/fileA.py parentfolder/gfolder/utilfolder/util.py parentfolder/gfolder/main.py

run main.py

Hai Vu · Accepted Answer · 2025-09-01 01:27:34Z

Using pathlib and sys, we can manipulate the import path:

import pathlib import sys root = pathlib.Path(__file__).parent.parent.parent sys.path.append(str(root)) from gfolder.utilfolder import util

The first .parent attribute will point to codefolder, the second points to gfolder and the last one points to parentfolder.

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