I am struggling with imports in Python.
Currently, this is my file structure:

.
├── my_project
│   ├── helpers
│   │   ├── SomeHelper.py
│   │   └── __init__.py
│   ├── CalculateStuff
│   │   ├── __init__.py
│   │   └── CalculateX.py
│   ├── __init__.py
│   └── main.py
├── poetry.lock
├── pyproject.toml
└── README.md

In CalculateStuff.CalculateX.py, there is the class CalculateX which requires SomeHelper.
Currently, that import looks like this:
from helpers.SomeHelper import SomeHelper

In main.py:

from CalculateStuff.CalculateX import CalculateX

x_calculator = CalculateX()
x_calculator.do_something()

This works fine, when I run the main script, e.g. use poetry run python my_project/main.py.
However, the different parts are under development. I want to use CalculateX.py as an etrypoint, too, and have it find its imports as well as run some test code (with if __name__ == "__main__":[...].

Furthermore, I want to be able to use the Python interactive window (within VS Code) to execute the code in any of the files in order to develop everything step by step. Unfortunately, I always get import errors.

How to achieve this, without tampering around with sys.path?

Thanks in advance!