class B(object):
a = 23
b = 45
def f(self): print "method f in class B"
def g(self): print "method g in class B"
class C(B):
b = 67
c = 89
d = 123
def g(self): print "method g in class C"
def h(self): print "method h in class C"
x = C( )
x.d = 77
x.e = 88