クラスとオブジェクトにプロパティとメソッドを動的に追加

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

#   2 Person，   p1，p2

p1 = Person('amy')
print(p1.name)
p1.age = 10         #  p1      
print(p1.age)       #   10

p2 = Person('anne')
print(p2.name)      
p2.age = 18         #  p2      
print(p2.age)       #   18

Person.sex = 'female'

print(p1.sex)    #    female

print(p2.sex)   #    female

p2.sex = 'male'

print(p2.sex)   #    male

#          sleep  

def sleep(self):
    print('%s sleep' % (self.name))


Person.sleep = sleep

Person.sleep(p1)     #    amy sleep

Person.sleep(p2)     #    anne sleep

import types    #             ，    types  

def eat(self):
    print('%s eat' % (self.name))

p.eat = types.MethodType(eat, p)    #   MethodType()  ，  1：   ，  2：   

p.eat()             #    amy eat