python 实现客户端和服务端接发数据

在Python中，我们可以使用socket模块来实现客户端和服务端的数据通信。以下是基本的步骤：

**服务端（Server）：**

import socket

def start_server():
    # 创建套接字
    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    
    # 绑定地址和端口
    server_address = ('localhost', 12345)
    server_socket.bind(server_address)

    # 开始监听连接
    server_socket.listen(1)  # 监听队列长度为1
    print(f"服务器正在监听...{server_address}")

    while True:
        # 等待连接
        connection, client_address = server_socket.accept()
        print(f"连接来自: {client_address}")
        
        # 接收客户端消息
        data = connection.recv(1024)
        print("Received:", data.decode())
        
        # 发送响应
        response = "Hello from Server!"
        connection.sendall(response.encode())

        # 关闭连接
        connection.close()

start_server()

**客户端（Client）：**

import socket

def send_data_to_server(message):
    # 创建套接字
    client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

    # 连接到服务器
    server_address = ('localhost', 12345)
    client_socket.connect(server_address)
    print(f"已连接到: {server_address}")

    # 发送数据
    client_socket.sendall(message.encode())
    print("Sent:", message)

    # 接收服务器响应
    received_message = client_socket.recv(1024).decode()
    print("Received:", received_message)

    # 关闭连接
    client_socket.close()

# 示例：向服务器发送消息
send_data_to_server("Hello, Server!")