socket + select 完成伪并发操作

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import socket
#创建一个socket对象
sk1 = socket.socket()
#绑定ip和端口
sk1.bind(('127.0.0.1', 8001))
#监听
sk1.listen()
#定义一个字典存放客户端发送的信息
message_dict = {}
#inputs用于存放socket对象
inputs = [sk1]
#哪一个客户端发送信息就把哪一个客户端的存放进output
output = []
import select
while True:
    r_list, w_list, e_list = select.select(inputs, output, inputs, 1)
    print('正在监听的socket%d' %len(inputs))
    print(r_list)
    for sk_or_conn in r_list:
        if sk_or_conn == sk1:
            conn, address = sk_or_conn.accept()
            inputs.append(conn)
            message_dict[conn] = []
        else:
            try:
                data_bytes = sk_or_conn.recv(1024)
            except Exception as ex:
                inputs.remove(sk_or_conn)
            else:
                data_str = str(data_bytes, encoding='utf-8')
                message_dict[sk_or_conn].append(data_str)
                output.append(sk_or_conn)
    for conn in w_list:
        data_message = message_dict[sk_or_conn][0]
        del message_dict[sk_or_conn][0]
        conn.sendall(bytes(data_message + '好',encoding='utf-8'))
        output.remove(conn)