I've wrote some functions in a Pythonfile. 
I need those File(s) in multiple Projects.

Sadly it is not possible to use shared datasets, because the import statement doesn't find those Files.

It'd be cool if I could upload a link to the file (like a seafile link), but it is also okay to just upload the file.

There is to few functionality to publish those functions to PyPi and it is not polished to do this.

Idea: 
Make sections inside Notebooks. 
These sections can be collapsed.
Maybe start sections with markdown headers, so every header can collapse until the next header.