import socket users={} host = '172.22.102.20' port = 9999 server_socket = socket.socket(socket.AF_INET,socket.SOCK_STREAM) server_socket.bind((host,port)) server_socket.listen(1) server_socket.listen(1) print('等待连接...') client_socket,client_address=server_socket.accept() print(f'已连接：{client_address}') while True: message=client_socket.recv(1024).decode('utf-8') print(f'客户端：{message}') if not message: break if message.startswith('register'): # 处理注册请求 _, username, password = message.split() # 解析用户名和密码 users[username] = password # 保存用户信息 reply_message = f'注册成功，用户名为{username}' elif message.startswith('login'): # 处理登录请求 _, username, password = message.split() # 解析用户名和密码 if users.get(username) == password: # 验证用户身份 reply_message = f'登录成功，欢迎{username}！' else: reply_message = '用户名或密码错误，请重新输入。' reply_message=f'已收到：{message}' client_socket.sendall(reply_message.encode('utf-8')) client_socket.close() client_socket.close()在此基础上增加一个获取客户端列表的功能

你可以在 while 循环中增加一个判断，当客户端发送的消息为 "get_client_list" 时，服务器向所有客户端发送一个包含当前连接的客户端列表的消息。以下是示例代码：

import socket

users = {}
connected_clients = set()

host = '172.22.102.20'
port = 9999

server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.bind((host, port))
server_socket.listen(1)

print('等待连接...')

client_socket, client_address = server_socket.accept()
connected_clients.add(client_socket)

print(f'已连接：{client_address}')

while True:
    message = client_socket.recv(1024).decode('utf-8')
    print(f'客户端：{message}')
    
    if not message:
        break
    
    if message.startswith('register'):
        _, username, password = message.split()
        users[username] = password
        reply_message = f'注册成功，用户名为{username}'
        
    elif message.startswith('login'):
        _, username, password = message.split()
        if users.get(username) == password:
            reply_message = f'登录成功，欢迎{username}！'
        else:
            reply_message = '用户名或密码错误，请重新输入。'
            
    elif message == 'get_client_list':
        reply_message = '当前连接的客户端列表：\n'
        for client in connected_clients:
            reply_message += f'{client.getpeername()[0]}:{client.getpeername()[1]}\n'
            
    else:
        reply_message = f'已收到：{message}'
        
    for client in connected_clients:
        client.sendall(reply_message.encode('utf-8'))

client_socket.close()
server_socket.close()

注意，为了支持多客户端连接，我们需要使用一个集合（set）来保存所有连接的客户端。在客户端连接时，我们将其加入这个集合中。在消息循环中，我们需要向所有客户端发送消息，而不只是当前连接的客户端。