ex41.py

class TheThing(object):
    """docstring for TheThing"""
    def __init__(self):
        self.number = 0

    def some_function(self):
        print "I got called."

    def add_me_up(self,more):
        self.number += more
        return self.number

#two different things 
a = TheThing()
b = TheThing()

a.some_function()
b.some_function()

print a.add_me_up(20)
print b.add_me_up(30)

print a.number
print b.number

# Study this. This is how you pass a variable
#from one class to another. You will need this

class TheMultiplier(object):
    """docstring for TheMUltiplier"""
    def __init__(self, base):
        super(TheMultiplier, self).__init__()
        self.base = base

    def do_it(self, m):
        return m * self.base


x = TheMultiplier(a.number)
print x.do_it(b.number)