hola.py

class A:

	def hola(self):
		print "Hola clase A"

	def a(self):
		print "Soy de A"
 
class B:
	def hola(self):
		print "Hola clase B"

	def b(self):
		print "Soy de B"
 
class C(B,A):
	def hola(self):
		print "Hola clase C"

	def c(self):
		print "Soy de C"

 
c = C()
c.hola()
 
class D(C,A,B):
	pass
 
d = D()
d.hola()

d.a()
d.b()
d.c()