Calling a class from a function

[Gribouillis]

I noticed you have a pass statement at the end of the class, is that necessary?

No it is not necessary. I wrote the 'pass' in order to give a non empty body to the class definition. A better idea is to write a docstring

>>> class A:
...     """This class does nothing"""
... 
>>> 

The class body can only contain return statements in the method's definition.