def greet(someone, anotherone):
   print someone, 'say hello to', anotherone


class Person(object):
   def __init__(self, name):
     self.name=name
   def __str__(self):
     return self.name

p1 = Person('test1')

p2 = Person('test2')

greet(p1, p2)
test1 say hello to test2

Person.greet = greet #ÕâÓÐЩ¿´²»¶®ÁË,ÄÇλ¸ø½âÊÍÏÂ

p1.greet(p2)
test1 say hello to test2
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重新定义对象里的方法

这里或说给 Person 加一个 greet 方法

貌似是我在 chinaunix 上发的？
Person.greet = greet 就是给 Person 加个方法了，名字叫 "greet" ，值就是 greet 这个函数对象了。
然后通过 p1 调用时（ p1.greet ），会把 p1 当做第一个参数传过去，也就等价于 greet(p1, p2) 了。


On 9/3/07, 韩志刚 <hanzg at known.cn> wrote:
>
> def greet(someone, anotherone):
>    print someone, 'say hello to', anotherone
>
>
> class Person(object):
>    def __init__(self, name):
>      self.name=name
>    def __str__(self):
>      return self.name
>
> p1 = Person('test1')
>
> p2 = Person('test2')
>
> greet(p1, p2)
> test1 say hello to test2
>
> Person.greet = greet #这有些看不懂了,那位给解释下
>
> p1.greet(p2)
> test1 say hello to test2
>
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-- 
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¶àл,¶þλ»ÆÐÖ!

ÔÚ07-9-3£¬º«Ö¾¸Õ <hanzg在known.cn> дµÀ£º
>
> def greet(someone, anotherone):
>    print someone, 'say hello to', anotherone
>
>
> class Person(object):
>    def __init__(self, name):
>      self.name=name
>    def __str__(self):
>      return self.name
>
> p1 = Person('test1')
>
> p2 = Person('test2')
>
> greet(p1, p2)
> test1 say hello to test2
>
> Person.greet = greet #ÕâÓÐЩ¿´²»¶®ÁË,ÄÇλ¸ø½âÊÍÏÂ
>
> p1.greet(p2)
> test1 say hello to test2
>
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