多线程

工厂模式

# -*- coding: UTF-8 -*-
class demo1(object):
    def p(self):
        print(1)
class demo2(object):
    pass
class demo3(object):
    pass
class demo(object):
    def create(self,type:str):
        if type == "1":
            return demo1()
        elif type == "2":
            return demo2()
        else:
            return demo3()

if __name__ == '__main__':
    d=demo()
    c=d.create("1")
    c.p()