python-单进程、线程、非堵塞实现并发的验证

import socket
import time

tcp_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
tcp_socket.bind(('', 7899))
tcp_socket.listen(128)
tcp_socket.setblocking(False)  # 设置套接字为非堵塞
client_socket_list = list()

while True:
    time.sleep(1)

    try:
        new_tcp_socket, tcp_addr = tcp_socket.accept()
    except Exception as ret:
        print('---没有新的客户到来---', ret)
    else:
        print('---只要没有产生异常，那么也就意味着来了一个新的客户端---')
        new_tcp_socket.setblocking(False)
        client_socket_list.append(new_tcp_socket)

    for client_socket in client_socket_list:
        try:
            recv_data = new_tcp_socket.recv(1024)
        except Exception as ret:
            print('---这个客户端没有发送数据过来---', ret)
        else:
            print(recv_data)
            if recv_data:
                print('---客户端发送了数据为{}'.format(recv_data))
            else:
                # 对方调用了close, 导致了 recv 返回
                client_socket.close()
                client_socket_list.remove(client_socket)

tcp_socket.close()