Some ios apps allows to share a directory of app documents. When you connect the ipad to a PC (like a simple Ubuntu 16) you can see all this shared directories and upload / download file and directories inside those shares.
An example is playerXtreme, but also iComix and a lot of apps. I think also Editorial lets do the same thing:
http://www.jackenhack.com/editorial-app-import-modules-with-pipista/
This would be a great way to add, download and handle pythonista projects: the share could contain python projects, and you should be able to upload easily your files.
Is it possible to add this feature?