ex44(隐式继承，显示覆写).py

#coding:utf-8

#隐式继承

class Parent(object):

	def implicit(self):
		print "PARENT implicit()"

class Child(Parent):
	pass

dad = Parent()
son = Child()

dad.implicit()
son.implicit()

#显示覆写

class Parent(object):

	def override(self):
		print "PARENT override()"
class Child(Parent):

	def override(self):
		print "CHILD override()."

dad = Parent()
son = Child()

dad.override()
son.override()


class Parent(object):

	def altered(self):
		print "PARENT altered()"

class Child(Parent):

	def altered(self):
		print "CHILD,BEFORE PARENT altered()"
		super(Child,self).altered()
		print "CHILD,AFTER PARENT altered()"

dad = Parent()
son = Child()
dad.altered()
son.altered()