Python hasattr,getattr,setattr,delattr

#!/usr/bin/env python# -*- coding:utf-8 -*-# 作者:Presley# 邮箱:[email protected]# 时间:2018-11-04# 反射使用import sysclass WebServer(object):    def __init__(self,host,port):        self.host = host        self.port = port    def start(self):        print("Server is starting...")    def stop(self):        print("Server is stopping...")    def restart(self):        self.stop()        self.start()

def test_run(ins,name):    print("running...",name,ins.host)

if __name__ == "__main__":    server = WebServer("localhost",333)    ‘‘‘#方法1    # #print(sys.argv[1])    # cmd_dic = {    #     "start":server.start,    #     "stop":server.stop    # }    # if sys.argv[1] in cmd_dic:    #     cmd_dic[sys.argv[1]]()‘‘‘

#1、hasattr,getattr    #方法二    if hasattr(server,sys.argv[1]):        func = getattr(server,sys.argv[1]) #获取server.start方法的内存地址        func() #相当于server.start()

#2、setattr    ‘‘‘    setattr(server,"run",test_run) #给实例绑定一个test_run方法,方法名字叫run    server.run(server,"wohaoshuai")#绑定的方法调用类中属性需要传入对象名称    ‘‘‘#3、delattr    delattr(WebServer,"start")    server.restart()#报错

原文地址：https://www.cnblogs.com/Presley-lpc/p/9903533.html