python 单线程实现并发

单线程下支持并发(服务端)：

 1 from gevent import spawn,monkey;monkey.patch_all()  
 2 from socket import *  
 3   
 4 def server(ip,port):  
 5     server = socket(AF_INET, SOCK_STREAM)  
 6     server.bind((ip,port))  
 7     server.listen(5)  
 8   
 9     while True:  
10         conn, addr = server.accept()  
11         print(addr)  
12         # ....  
13         # t=Thread(target=talk,args=(conn,add))  
14         # t.start()  
15         spawn(talk,conn,addr)  
16   
17 def talk(conn,addr):  
18     while True:  
19         try:  
20             data=conn.recv(1024)  
21             if not data:break  
22             conn.send(data.upper())  
23         except ConnectionResetError:  
24             break  
25     conn.close()  
26   
27 if __name__ == '__main__':  
28     server('127.0.0.1',8080) 

单线程下实现并发(客户端)：

1 from socket import *  
2 client = socket(AF_INET, SOCK_STREAM)  
3 client.connect(('127.0.0.1',8080))  
4   
5 while True:  
6     client.send('hello'.encode('utf-8'))  
7     data=client.recv(1024)  
8     print(data.decode('utf-8'))