python 建立客户端和服务器多线程

在Python中，建立客户端和服务器的多线程通信通常涉及使用`socket`库和`threading`模块。下面是一个简单的例子，展示了如何创建一个基础的TCP服务器和客户端，它们都包含多线程处理连接：

**服务器端（server.py）**:

import socket
import threading

def handle_client(client_socket):
    request = client_socket.recv(1024)
    print(f"Received: {request.decode('utf-8')}")
    client_socket.sendall("Server received".encode('utf-8'))
    client_socket.close()

def start_server():
    host = 'localhost'
    port = 12345
    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    server_socket.bind((host, port))
    server_socket.listen(1)

    print(f"Server is running on {host}:{port}")

    while True:
        client, addr = server_socket.accept()
        print(f"Accepted connection from {addr[0]}:{addr[1]}")
        client_handler = threading.Thread(target=handle_client, args=(client,))
        client_handler.start()

start_server()

**客户端（client.py）**:

import socket
import threading

def connect_to_server(server_host, server_port):
    client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    client_socket.connect((server_host, server_port))

    def send_message(message):
        client_socket.sendall(message.encode('utf-8'))
        response = client_socket.recv(1024).decode('utf-8')
        print(f"Response from server: {response}")

    message = input("Enter a message to send: ")
    sending_thread = threading.Thread(target=send_message, args=(message,))
    sending_thread.start()

connect_to_server('localhost', 12345)

在这个例子中，服务器启动一个监听套接字，并在一个新线程中处理每个新连接的客户端请求。客户端也创建一个单独的线程来发送消息。