#!/usr/local/bin/python3
class A(object):
  def __init__(self):
    self.a = 1

class B(A):
  def __init__(self):

    super().__init__()
    self._a = 9
    #super(A, self).__init__()
    #print(super())

  @property
  def a(self):
    return self._a

print(B().a)