socket + select 完成伪并发操作

 1 #!/usr/bin/env python
 2 # -*- coding: utf-8 -*-
 3
 4 import socket
 5 #创建一个socket对象
 6 sk1 = socket.socket()
 7 #绑定ip和端口
 8 sk1.bind((‘127.0.0.1‘, 8001))
 9 #监听
10 sk1.listen()
11 #定义一个字典存放客户端发送的信息
12 message_dict = {}
13 #inputs用于存放socket对象
14 inputs = [sk1]
15 #哪一个客户端发送信息就把哪一个客户端的存放进output
16 output = []
17 import select
18 while True:
19     r_list, w_list, e_list = select.select(inputs, output, inputs, 1)
20     print(‘正在监听的socket%d‘ %len(inputs))
21     print(r_list)
22     for sk_or_conn in r_list:
23         if sk_or_conn == sk1:
24             conn, address = sk_or_conn.accept()
25             inputs.append(conn)
26             message_dict[conn] = []
27         else:
28             try:
29                 data_bytes = sk_or_conn.recv(1024)
30             except Exception as ex:
31                 inputs.remove(sk_or_conn)
32             else:
33                 data_str = str(data_bytes, encoding=‘utf-8‘)
34                 message_dict[sk_or_conn].append(data_str)
35                 output.append(sk_or_conn)
36     for conn in w_list:
37         data_message = message_dict[sk_or_conn][0]
38         del message_dict[sk_or_conn][0]
39         conn.sendall(bytes(data_message + ‘好‘,encoding=‘utf-8‘))
40         output.remove(conn)