from multiprocessing import Process

 import time,random

 import os

 def piao(name):

     print(os.getppid(),os.getpid())

     print('%s is piaoing' %name)

     # time.sleep(random.randint(1,3))

     print('%s is piao end' %name)

 if __name__ == '__main__':

     p1=Process(target=piao,kwargs={'name':'alex',})

     p2=Process(target=piao,args=('wupeiqi',))

     p3=Process(target=piao,kwargs={'name':'yuanhao',})

     p1.start()

     p2.start()

     p3.start()

     print('主进程',os.getpid())

 from multiprocessing import Process

 import time,random

 import os

 class Piao(Process):

     def __init__(self,name):

         super().__init__()

         self.name=name

     def run(self):

         print(os.getppid(),os.getpid())

         print('%s is piaoing' %self.name)

         # time.sleep(random.randint(1,3))

         print('%s is piao end' %self.name)

 if __name__ == '__main__':

     p1=Piao('alex')

     p2=Piao('wupeiqi')

     p3=Piao('yuanhao')

     p1.start()

     p2.start()

     p3.start()

     print('主进程',os.getpid(),os.getppid())

 from socket import *

 from multiprocessing import Process

 s=socket(AF_INET,SOCK_STREAM)

 s.setsockopt(SOL_SOCKET,SO_REUSEADDR,1) #就是它，在bind前加

 s.bind(('127.0.0.1',8088))

 s.listen(5)

 def talk(conn,addr):

     while True: #通信循环

         try:

             data=conn.recv(1024)

             if not data:break

             conn.send(data.upper())

         except Exception:

             break

     conn.close()

 if __name__ == '__main__':

     while True:#链接循环

         conn,addr=s.accept()

         p=Process(target=talk,args=(conn,addr))

         p.start()

     s.close()

 from socket import *

 c=socket(AF_INET,SOCK_STREAM)

 c.connect(('127.0.0.1',8088))

 while True:

     msg=input('>>: ').strip()

     if not msg:continue

     c.send(msg.encode('utf-8'))

     data=c.recv(1024)

     print(data.decode('utf-8'))

 c.close()