My directory structure is as follows.

```
project/
  jupyter/
    note.ipynb
  src/
    some_script.py
    another_script.py

```

The `jupyter` subdirectory contains Jupyter notebooks and the `src` subdirectory contains my `.py` files. The `src` subdirectory is marked as the sources root.

In the Jupyter notebook `note.ipynb`, if I do `import some_script`, then I get `ImportError: No module named 'some_script'`. However, `from src import some_script` works fine, but not if `some_script` also has a line `import another_script`. In my mind I'm thinking that there is a setting or switch somewhere that adds the `src` subdirectory to the `PYTHONPATH` used by the Jupyter Notebook environment by default, but I don't know how to do it, could you help?

I know that I can always use `sys.path.append` but I don't want to do that in every single Jupyter notebook I create. I know also that I can just put the `.ipynb` files and `.py` files in the same subdirectory but I don't like organising my work that way. Finally, I know I can just set the project directory as my sources root instead of the `src` subdirectory, but that would mean that I'd have to do `from src import ...` everywhere in my `.py` scripts, and obviously I don't want to do that. Is there a solution to this problem as I've described above?