Python Plone views call others
Just import it and call it as any other function.  You don't want to make it a view - that requires you to do a MultiAdapter lookup which is a real pain, and completely unnecessary.
[Edit - strictly using a view is a MultiAdapter lookup, but you can shortcut it via traversal, but that still isn't worth the effort]
I have a Python function registered as a View in Plone.  I need to be able to call another function from within this registered function.  I'm not sure if it would be best to register this other function as a view as well and try to call that (don't know how to call other views), or if there is a better way to handle this.
Basically I'm creating a function in Python that needs to be callable from other Python functions (that are registered as Views).

Edit -
I have tried calling it like any other function:

(pytest.py)
def Test(self):
    return "TEST"
And in my Python script registered as a view:
import pytest
def PageFunction(self):
    return pytest.Test()
However, this always seems to crash.  If I leave the pytest.Test() out and return a simple string, it seems to work fine (so I don't think the import pytest line is causing any problems...)