Python--socketserve源码分析

Posted 2020-10-21 Fate0729

class ThreadingTCPServer(ThreadingMixIn, TCPServer): pass

实现原理：

　　s =socketserver.ThreadingTCPServer(参数1，参数2，......)

　　根据ThreadingTCPServer的基类顺序，依次匹配各基类的构造函数参数

　　若第一个没构造函数则向后匹配

　　若有构造函数但参数不匹配则报错

　　若有构造函数且参数匹配则调用基类构造函数，并停止匹配过程

情况1：

#coding:UTF-8

class Base:def fun(self):
        print ("Base fun")

class B:
    def __init__(self, a, b):
        print (a,b)

class A(Base, B):
    pass        

if __name__ == "__main__":
    a = A(1,2)

>>>> 1,2

情况2：

#coding:UTF-8

class Base:
    def __init__(self):
        self.ip = "192.168.3.8"
        self.port = 1122
        self.fun()

    def fun(self):
        print ("Base fun")

class B:
    def __init__(self, a, b):
        print (a,b)

class A(Base, B):
    pass        

if __name__ == "__main__":
    a = A(1,2)

>>>> Traceback (most recent call last):

>>>> File "test.py", line 20, in <module>
>>>> a = A(1,2)
>>>> TypeError: __init__() takes 1 positional argument but 3 were given
情况3：

#coding:UTF-8

class Base:
    def __init__(self, a, b):
        self.ip = "192.168.3.8"
        self.port = 1122
        self.fun()

    def fun(self):
        print ("Base fun")

class B:
    def __init__(self, a, b):
        print (a,b)

class A(Base, B):
    pass        

if __name__ == "__main__":
    a = A(1,2)
    

>>>> Base fun