Python no module named error on raspi and not windows

The module i am trying to import is part of a project with the structure

VIS/

_init_.py

--Objects/

----_init_.py

----_Root.py

i am trying to import Root from _Root.py as from VIS.Objects import Root

importantly the code for the init.py in Objects has the code

from VIS.Objects._WindowGeometry import * from VIS.Objects._Root import * from VIS.Objects._SubRoot import * __all__ = ["WindowGeometry","Root","SubRoot"]

I can import Root perfectly fine on windows, but when I try on raspberry pi it does not work.