python之函数用法setattr(),了解即可

# -*- coding: utf-8 -*-
#python 27
#xiaodeng
#python之函数用法setattr(),了解即可
#http://www.cnblogs.com/hongfei/p/3858256.html

#setattr()
#说明：给object对象添加新的name(属性)和value(属性值)，通常在class中运用较多
'''
setattr(...)
    setattr(object, name, value)

    Set a named attribute on an object; setattr(x, 'y', v) is equivalent to
    ``x.y = v''.
'''

#案例
class Student():
    def __init__(self,name,age):
        self.name=name
        self.age=age

    def __str__(self):
        return self.name

student=Student('xiaodeng',28)
print student                   #xiaodeng
print student.name              #xiaodeng
print student.age               #

#setattr
setattr(student,'set','')
print student.__dict__          #{'age': 28, 'set': '1', 'name': 'xiaodeng'}

#__setattr__;通常在class中运用较多