class A:
    pass
 
class B:
    pass
 
class C(A):
    pass
 
class D(A, B):
    pass
 
"""
 Vérifier si l'objet passé en paramètre
 est une sous classe d'une classe définie
 """
def evaluer(object):
    print object, "=>",
    if issubclass(object, A):
        print "A",
    if issubclass(object, B):
        print "B",
    if issubclass(object, C):
        print "C",
    if issubclass(object, D):
        print "D",
    print
 
evaluer(A)
evaluer(B)
evaluer(C)
evaluer(D)
evaluer("string")
 
"""
__main__.A => A
__main__.B => B
__main__.C => A C
__main__.D => A B D
string =>
Traceback (most recent call last):....
"""