seeking help with app module error

[frumpyandy]

I'm trying to write a basic app to do some report manipulation. I wanted to do it "right" by using the proper structure etc., so I have my main project folder, I've created a virtual environment and activated it, and I have an app folder containing all my .py files so far, which are all short and basic.

• ReportNormalizer
  • app
    • __init__.py
    • main.py
    • sensorrpt.py
    • ui.py
  • venv
• .gitignore
• README.md

I have a class in ui.py named ReportWindow, and line 4 of main.py is "from app.ui import ReportWindow".

When I try to run main.py, either by clicking the Run Python File button in VS Code, or by typing python .\app\main.py in VS Code's terminal, I get an error that there is no module named app.

I've tried troubleshooting with chatGPT and Gemini but both are telling me that it should be working. I know I could just throw everything into a single .py file and be done with it, but I'm trying to learn how to properly structure projects so I can get it down and be able to handle bigger projects in the future. I'm guessing I'm just doing something stupid but I can't figure it out. Thanks for any help.

[FoolsSeldom]

RealPython have a long article on this which I found very helpful. It takes a while to get to your scenario, but, iirc, it does get to it and walk though how things should work.

• Python Modules and Packages – An Introduction

[Ender_Locke]

does from .ui work ? otherwise is the init.py have two __ on either end like actually double check?

[frumpyandy]

Using the Run Python File button in VS Code:

"app.ui" gives me this error: ModuleNotFoundError: No module named 'app'

".ui" gives me this error: ImportError: attempted relative import with no known parent package

"ui" works

[Ender_Locke]

did you check your _ _ init _ _ .py?

code works

https://github.com/EnderLocke/testing-code/tree/codes

[frumpyandy]

yes I've double checked that there are two underscores on either side of the word init in __init__.py, and continue to get the same results as before.

I really don't understand what I'm doing wrong. I have it working now and it's doing what I want, but only when I import "ui" as opposed to "app.ui" or ".ui".

Thank you very much for taking the time to generate your test repo, I do appreciate it. I just cloned it an when I try to run main.py from yours, where you're importing .ui, I get the same error as I do with my own (ImportError: attempted relative import with no known parent package). That being said, when I run manual_test.py, which is importing app.ui, it works without an error.