class Song(object):#definition

    def __init__(self, lyrics):
        self.lyrics = lyrics#add attribution

    def sing_me_a_song(self):#methods
        for line in self.lyrics:
            print line

happy_bday = Song(["Happy birthday to you",
                   "I don't want to get sued",
                   "So I'll stop right there"])#object1

bulls_on_parade = Song(["They rally around the family",
                        "With pockets full of shells"])#object2

happy_bday.sing_me_a_song()#call function

bulls_on_parade.sing_me_a_song()

inheritance(继承)

class Parent(object):

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

class Child(Parent):
    pass

dad = Parent()
son = Child()

dad.implicit()
son.implicit()

overload(重载)and override(覆写)

void f(string str)//输出字符串str  1次
{
      cout<<str<<endl;
}
void f(string str,int times)//输出字符串  times次
{
      for(int i=0;i<times;i++)
       {
            cout<<str<<endl;
        }
}

<span style="font-size:18px;">def f(str,times=1):
       print str*times
f('sssss')
f('sssss',10)</span>

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()

class Child(Parent):

    def __init__(self, stuff):
        self.stuff = stuff
        super(Child, self).__init__()