importing code from git submodule

I checked out a git repo with notebooks.
The structure is something like this

```
ROOT/
submodule/
mymodule.py
notebooks/
mynotebook.ipynb
```

the whole ROOT folder is handed to Carnets by the Working Copy app, and the submodule directory is a git submodule that is checked out (I can see the contents in Carnets)

now if I want to access code from `mymodule.py` in `mynotebook.ipynb` I typically do this like this:

```
sys.path.append("..")
from submodule.mymodule import someClass
```

this works fine on macOS and Linux, but in Carnets I get the error `No module named 'submodule'`

I'm not sure wether this is a limitation of Carnets or of the iOS API that shares this directory structure from Working Copy to Carnets. Either way, is there another way I could achieve this?

Reproduce the reported ROOT/submodule/notebooks structure with Working Copy and Carnets, starting from the import in mynotebook.ipynb and the mymodule.py location. Investigate how Carnets receives the shared directory and resolves sys.path; done means the import works or the limitation and a supported workaround are clearly documented.

Written by the indexing model from the issue text.