import random

class A:
    def a(self):
	x = random.random()
	print x

class B:
    def b(self):
	x = random.random()
	print x

random.seed(33)
aa = A()
aa.a()
bb = B()
bb.b()

---------------------------

$ python ~/scope.py 
0.570328423137
0.632232995579