"""Simple illustration of a Python class inheritance hirearchy

>>> import parentchild
>>> c = parentchild.Child(32, 'house')
>>> c
<parentchild.Child object at 0xb732ce6c>
>>> c.x
32
>>> c.y
'house'
>>> p = parentchild.Parent(16)
>>> p
<parentchild.Parent object at 0xb732cd8c>
>>> p.x
16
"""

class Parent(object):
    def __init__(self, x):
        self.x = x


class Child(Parent):
    def __init__(self, x, y):
        super(Child, self).__init__(x)
        self.y = y