Using git submodule to import a python project

You could also add mysubmod to sys.path when you starting your myproj. Then mysubmod/models/hello.py will find lib.foobar.

OK the answer is (after many wrong turns)

• add a single top level package mysubmod (eg 'helloworld')
• with mysubmod imported into myprod as a submodule, symbolically link the helloworld package into the myprod root ('ln -s mysubmod/helloworld helloworld')

This way, the package structure is maintained whether you are working with the submod as a submodule or on a standalone basis.