python class methods and inheritance

Question

I would expect the following code to print 012345 but it prints 012012. Why? I would expect the calls to incr to be accessing the same variables since they are inherited fro

Answer 1

Both class b and class c inherit from class a separately, and var is set to 0 each time.

One way to have class c to get the same value of var in class a as class b does, class c can inherit from class b like so:

class a(object):
    var = 0  
    @classmethod
    def incr(cls):
        print cls.var
        cls.var+=1

class b(a):
    def func(self):
        super(b,self).incr()

class c(b):
    def func(self):
        super(c,self).incr()


t = a()
t1 = b()
t2 = c()
t1.func()
t1.func() 
t1.func()
t2.func()
t2.func()
t2.func()`