Python实现通过继承覆盖方法示例

class P(object):
  def foo(self):
    print "I am a P-foo()"
class C(P):
  def foo(self):
    print "I am a C-foo()"
>p=P()
>c=C()
>p.foo()
I am a P-foo()
>c.foo()
I am a C-foo()

class P(object):
  def __init__(self):
    print "P's constructor"
class C(P):
  def __init__(self):
    print "C's constructor"
>c=C()
C's constructor

class C(P):
  def __init__(self):
 P.__init__(self)
    print "C's constructor"

class C(P):
  def __init__(self):
 super(C,self).__init__()
    print "C's constructor"