How to invoke the super constructor in Python?

Question

class A:
    def __init__(self):
        print(\"world\")

class B(A):
    def __init__(self):
       print(\"hello\")

B()  # output: hello

In all

Answer 1

With Python 2.x old-style classes it would be this:

class A: 
 def __init__(self): 
   print "world" 

class B(A): 
 def __init__(self): 
   print "hello" 
   A.__init__(self)