CODEWITHSUNDEEP
python
Happy Machine
Happy Machine

Reputation: 1163

import from a parent folder in python

Ive read a few posts with people struggling with this, spent a couple of hours trying various approaches but nothing has worked.

Very very simple, i just want to import code from a parent folder. The parent root folder of project has an empty init.py file

the structure is

__init__.py
services/
services/service_factory.py
etl/
etl/main.py

in the etl folder i am running python main.py

here is my main.py i've made it as simple as possible:

import sys, os
sys.path.append(os.path.abspath(os.path.join('..', 'services')))
from services.services_factory import *
print('hello world')

I get 'ModuleNotFoundError: No module named 'services' Can anyone explain what to change to get this to work?

Upvotes: 1

Views: 127

Answers (2)

MarcoP
MarcoP

Reputation: 1776

This is always very cofusing. Relative imports are relative to the module structure. To test relative imports, you need to import your module in your main file (from outside the module). Let me try to show a case that works:

$ python test_module.py
Hello World!

Or you can make it an executable module and run it with python -m (always from outside the module)

$ python -m module.etl
Hello World!

Structure

test_module.py
module
├── __init__.py [can be empty]
├── etl
   ├── __init__.py
   ├── __main__.py
│── services
   ├── service_factory.py

test_module.py

from module.etl import message
print(message)

service_factory.py

phrase = "Hello World"
mark = '!'

etl/__init__.py

from .__main__ import message

etl/__main__.py

from .. services.service_factory import phrase,mark

message = phrase+mark

if __name__ == "__main__":
    #this block is run when executing `python -m module.etl`

    print(message)

NOTE: if you add another file in etl say etl/myscript.py you can still execute it with python -m module.etl.myscript (always from outside the module)

Upvotes: 1

marcin
marcin

Reputation: 567

Try to run it as a module, your cwd should be one level higher than main.py.

python -m etl.main

Upvotes: 0

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