Variable Modifications in a class

[Mehta, Anish]

Hello!

I am having a problem in tackling the variables in the class.

class AB:
   def __init__(self):
       self.a = None
       self.b = None

def func(ab):
   b = ab()
   c = ab()

   b.a = 5
   b.b = 10

   c = b

   c.a = 30
   c.b = 40

   print b.a, b.b
   print c.a, c.b
   t = func(AB)


Output is
30 40
30 40

I want the output to be
5 10
30 40

I mean every instance should modify its own set of variables not the 
variables of the other instances of the class. The output of the set of 
variables of b should not be affected by modifying those variables by 
another instance of the same class.

Waiting for suggestions.

Thanks in advnace.

Regards,

Anish