class p1(object): pass
class p2(p1): pass
So p2 is the subclass of p1. Is there a way to find out programmatically that p1 is [one of] the superclass[es] of p2 ?
using <class>.__bases__ seems to be what you're looking for...
>>> class p1(object): pass
>>> class p2(p1): pass
>>> p2.__bases__
(<class '__main__.p1'>,)