understanding the concept of method resolution ordering in python -

when call x=d() why c's init() not getting called b's init() getting called , d's constructor..should'nt order b,a,c,d secondly,x.f() shows error wrong argument passing ..

what doing wrong??

concerning f, forgot self keyword declare them methods.

for calls constructors, need use 'super' in each , every class of inheritance tree.

class a(object):     def __init__(self):         super(a, self).__init__()         print "a.__init__"      def f(self):         print "a.f"  class b(a, object):     def __init__(self):         super(b, self).__init__()         print "b.__init__"  class c(object):     def __init__(self):         super(c, self).__init__()         print "c.__init__"      def f(self):         print "c.f"  class d(b, c, object):     def __init__(self):         super(d, self).__init__()         print "d.__init__"  x = d() x.f() 

and :

c.__init__ a.__init__ b.__init__ d.__init__ a.f