python并发编程之多进程(一)：进程开启方式&多进程
一，进程的开启方式
利用模块开启进程
1 from multiprocessing import Process 2 import time,random 3 import os 4 def piao(name): 5 print(os.getppid(),os.getpid()) 6 print('%s is piaoing' %name) 7 # time.sleep(random.randint(1,3)) 8 print('%s is piao end' %name) 9 if __name__ == '__main__': 10 p1=Process(target=piao,kwargs={'name':'alex',}) 11 p2=Process(target=piao,args=('wupeiqi',)) 12 p3=Process(target=piao,kwargs={'name':'yuanhao',}) 13 p1.start() 14 p2.start() 15 p3.start() 16 print('主进程',os.getpid())
利用类开启进程
1 from multiprocessing import Process 2 import time,random 3 import os 4 class Piao(Process): 5 def __init__(self,name): 6 super().__init__() 7 self.name=name 8 def run(self): 9 print(os.getppid(),os.getpid()) 10 print('%s is piaoing' %self.name) 11 # time.sleep(random.randint(1,3)) 12 print('%s is piao end' %self.name) 13 if __name__ == '__main__': 14 p1=Piao('alex') 15 p2=Piao('wupeiqi') 16 p3=Piao('yuanhao') 17 18 p1.start() 19 p2.start() 20 p3.start() 21 print('主进程',os.getpid(),os.getppid())
二，多进程
服务器端
1 from socket import * 2 from multiprocessing import Process 3 s=socket(AF_INET,SOCK_STREAM) 4 s.setsockopt(SOL_SOCKET,SO_REUSEADDR,1) #就是它，在bind前加 5 s.bind(('127.0.0.1',8088)) 6 s.listen(5) 7 def talk(conn,addr): 8 while True: #通信循环 9 try: 10 data=conn.recv(1024) 11 if not data:break 12 conn.send(data.upper()) 13 except Exception: 14 break 15 conn.close() 16 if __name__ == '__main__': 17 while True:#链接循环 18 conn,addr=s.accept() 19 p=Process(target=talk,args=(conn,addr)) 20 p.start() 21 s.close()
客户端
1 from socket import * 2 c=socket(AF_INET,SOCK_STREAM) 3 c.connect(('127.0.0.1',8088)) 4 5 while True: 6 msg=input('>>: ').strip() 7 if not msg:continue 8 c.send(msg.encode('utf-8')) 9 data=c.recv(1024) 10 print(data.decode('utf-8')) 11 c.close()
