Python 实现网络通信（通常称为“网口通信”）的方式有很多，最常用的库是内置的 `socket` 库。这个库提供了一组丰富的函数用于创建、管理和操作套接字 (sockets)，而套接字则是实现跨计算机进程间通讯的基础组件。 下面简要介绍下如何使用 Python 的 socket 模块来进行基本的数据传输： ### 服务器端代码示例 ```python import socket # 创建TCP/IP套接字 server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # 绑定监听地址和端口号 ('localhost', 端口号) 或者 ("0.0.0.0", port) server_address = ('localhost', 8090) print(f"Starting up on {server_address[0]} port {server_address[1]}") server_socket.bind(server_address) # 监听连接请求 server_socket.listen(5) while True: # 等待客户端建立连接... print('Waiting for a connection') client_connection, addr = server_socket.accept() try: print(f'Connection from {addr}') while True: data = client_connection.recv(16).decode("utf-8").strip() # 接收数据并解码 if not data or data.lower().find('bye') != -1: break print(f"Received '{data}'") message_to_send_back = "Echo: " + str(data).upper() encoded_message = bytes(message_to_send_back.encode()) client_connection.sendall(encoded_message) finally: # 清理资源，关闭连接 print("Closing current connection.") client_connection.close() ``` ### 客户端代码示例 ```python import socket client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) try: # 连接到远程主机 client_socket.connect(('localhost', 8090)) messages = ["Hello Server.", "Good Day!", "Bye"] for msg in messages: sent = client_socket.send(msg.encode()) # 发送消息 response = '' amount_received = 0 while amount_received < len(msg): more_data = client_socket.recv(16).decode("utf-8") amount_received += len(more_data) response += more_data.strip() print(f"Server replied: {response}") finally: print("Closing the connection with server...") client_socket.close() ``` 以上两个脚本分别代表了一个简单的回显服务端程序以及与其交互的一个客户端应用程序。需要注意的是实际应用中应当考虑更多异常情况处理，并优化性能等细节问题。