Python modulenotfounderror is name of app

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Hi,
I am very new to Python. I have taken on a project by someone who left. It is in Pycharm and I am trying to use pipenv.

In Pycharm, the project has folder path ./a/b/app (I have changed the folder names from their real names to a,b)

The path to flask_application.py is ./a/b/app/flask_application.py
There is also a file ./a/b/app/common_functions.py which I need to access from flask-application.

When I try to run the project I get the error:

File "....a/b/app/flask-application.py" line 8 in <module>
import b.app.common_functions as common
'ModuleNotFoundError: No module named 'b'

What do I need to do to get rid of this error? It is not a package that needs to be installed, it is a file that seems to not know about the project it is part of.

What I have tried:

I have tried installing 'b' and the pipfile has a line under [packages]
b = "*"
but it still gives that error

Posted 9-Nov-21 0:17am

Jackie Lloyd 2021

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Comments

Richard MacCutchan 9-Nov-21 6:26am

The error message is telling you that Python cannot find a valid path starting at b in the module that it is trying to build. You need to check the structure of your project, and find out exactly where this module is in relation the the one doing the import.

Jackie Lloyd 2021 9-Nov-21 6:58am

Thank you for helping.
flask-application.py is doing the import to access common_functions.py.
they are both in a/b/app
so I can't see what the problem is

I apologise if I am missing something which should be obvious.

mbancroft 9-Nov-21 10:14am

is the folder "a" on your python path? I think Python is going to look in those folders for a "b" folder and then for a common_functions within that.
The alternative might be to use a relative import rather than an absolute one i.e. with "from . import common_functions as common"

Jackie Lloyd 2021 11-Nov-21 4:24am

Hi, thank you for all your help, I did try that and it didn't make any difference. In the end I just pulled the code again and redid the setup and the problem has not reappeared, which is still slightly annoying that I don't know why it happened!

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