How do I import custom functions from relative paths in Python?

Question

I have one project directory and three sub-folders as such:

Project
--V1
--V2
--Testing

V1 and V2 contain versions of the same code, and Testing contains scripts that run code from V1 and V2.

Lets say V1 and V2 each contain helper functions in a file called helper.py that take a value and does something to it as such:

Project
--V1
----helper.py
--V2
----helper.py
--Testing

helper.py

def someFunc(value):
    # do something w/ value

How can I import these functions into a python file inside Testing? I am trying to achieve something like the following, which does not work:

from ../V2.helper import someFunc

Thanks for the help!

Why do you say it doesn't work? What result are you getting? — HuLu ViCa
– HuLu ViCa, Commented Jun 22, 2022 at 0:49

HuLu ViCa · Accepted Answer · 2022-06-22 00:53:50Z

1

First, you have to make each folder a python module, by adding an __init__.py file to each one, like this:

Project
__init__.py
--V1
----helper.py
----__init__.py
--V2
----helper.py
----__init__.py
--Testing
--__init__.py

With this, you can make absolute imports in your scripts:

from Project.V2.helper import someFunc

answered Jun 22, 2022 at 0:53

HuLu ViCa

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1 Comment

waslow Over a year ago

I will try this, thanks! Does the init function register the dir with the python interpreter or something to that effect? Can you explain how this works?

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