Python concurrent Programming: multithreading-two ways to turn on threads

Introduction of a threading module

The Multiprocess module completely imitates the interface of the threading module, which has a great similarity in the use level.

Two ways to open a thread

Way One

From threading Import Threadimport timedef Sayhi (name):    time.sleep (2)    print ("%s say hello"% name) if __name__ = = ' __main__ ':    t = Thread (Target=sayhi, args= (' Mike '))    T.start ()    print ("Main thread")

Way Two

From threading Import Threadimport Timeclass Sayhi (Thread):    def __init__ (self, name):        super (). __init__ ()        Self.name = name    def run (self):        time.sleep (2)        print ('%s say hello '% self.name) if __name__ = = ' __main__ ': 
   t = Sayhi (' Mike ')    T.start ()    print ("Main thread")

　　

Three exercises

1, multi-threaded implementation of the concurrent socket communication

Client:

From socket import *ip = ' 127.0.0.1 ' port = 8081c = Socket (af_inet, Sock_stream) c.connect ((IP, port)) while True:    msg = Input ("Please enter the client's information"). Strip ()    if not msg:        continue    c.send (Msg.encode (' Utf-8 '))    data = C.RECV (1024    print ("Message Received:", Data.decode (' Utf-8 '))

　　

Service side:

From socket Import *from threading import Threaddef Talk (conn): While    True:        try:            data = CONN.RECV (1204)            If not data:                break            Conn.send (Data.upper ())        except Connectionreseterror:            break    conn.close () def Server (IP, port):    server_socket = socket (af_inet, sock_stream)    server_socket.bind ((IP, port))    Server_ Socket.listen (1)    while True:        conn, addr = server_socket.accept ()        p = Thread (Target=talk, args= (conn,))        P.start ()    conn.close () if __name__ = = ' __main__ ':    server (' 127.0.0.1 ', 8081)

Python concurrent Programming: multithreading-two ways to turn on threads