MCP Client Example ☀️

Okay, here's a basic example of a Python client and server using the `mcp` library (assuming you meant the Minecraft Protocol, and you're looking for a simplified example, not a full Minecraft server implementation). This example focuses on establishing a connection and sending/receiving simple data. **Important Considerations:** * **`mcp` Library:** There isn't a standard Python library called `mcp`. If you're referring to the Minecraft Protocol, you'll likely need to use a library like `mcstatus` or `nbt` for more complex interactions. This example uses standard sockets for a simplified demonstration. * **Minecraft Protocol Complexity:** The actual Minecraft protocol is *very* complex. This example is a *highly* simplified illustration and won't actually connect to a real Minecraft server or handle the full protocol. * **Error Handling:** This example lacks robust error handling for brevity. In a real application, you'd need to handle exceptions (e.g., connection refused, socket errors, timeouts) properly. * **Security:** This example is for demonstration purposes only and is not secure. Do not use it in a production environment without proper security measures. **Simplified Example (Sockets):** **Server (server.py):** ```python import socket HOST = '127.0.0.1' # Standard loopback interface address (localhost) PORT = 65432 # Port to listen on (non-privileged ports are > 1023) with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s: s.bind((HOST, PORT)) s.listen() print(f"Server listening on {HOST}:{PORT}") conn, addr = s.accept() with conn: print(f"Connected by {addr}") while True: data = conn.recv(1024) if not data: break decoded_data = data.decode('utf-8') print(f"Received: {decoded_data}") response = f"Server received: {decoded_data}".encode('utf-8') conn.sendall(response) ``` **Client (client.py):** ```python import socket HOST = '127.0.0.1' # The server's hostname or IP address PORT = 65432 # The port used by the server with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s: s.connect((HOST, PORT)) message = "Hello, Server!" s.sendall(message.encode('utf-8')) data = s.recv(1024) print(f"Received: {data.decode('utf-8')}") ``` **How to Run:** 1. **Save:** Save the code as `server.py` and `client.py`. 2. **Run the Server:** Open a terminal or command prompt and run `python server.py`. The server will start listening for connections. 3. **Run the Client:** Open another terminal or command prompt and run `python client.py`. The client will connect to the server, send a message, and receive a response. **Explanation:** * **Server:** * Creates a socket, binds it to an address and port, and listens for incoming connections. * `s.accept()` blocks until a client connects. * `conn.recv(1024)` receives data from the client (up to 1024 bytes at a time). * `conn.sendall()` sends data back to the client. * **Client:** * Creates a socket and connects to the server's address and port. * `s.sendall()` sends data to the server. * `s.recv(1024)` receives data from the server. * `decode('utf-8')` converts the received bytes to a string. * `encode('utf-8')` converts the string to bytes for sending. **To connect to a real Minecraft server (which is much more complex):** You'll need a library that handles the Minecraft protocol. Here's a basic example using `mcstatus`: ```python from mcstatus import JavaServer server = JavaServer.lookup("example.com:25565") # Replace with your server address status = server.status() print(f"The server has {status.players.online} players online") ``` **Chinese Translation of the Simplified Example's Comments:** **Server (server.py):** ```python import socket HOST = '127.0.0.1' # 标准的回环接口地址 (localhost) - Standard loopback interface address (localhost) PORT = 65432 # 监听的端口 (非特权端口大于 1023) - Port to listen on (non-privileged ports are > 1023) with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s: s.bind((HOST, PORT)) s.listen() print(f"服务器监听在 {HOST}:{PORT}") # Server listening on {HOST}:{PORT} conn, addr = s.accept() with conn: print(f"连接来自 {addr}") # Connected by {addr} while True: data = conn.recv(1024) if not data: break decoded_data = data.decode('utf-8') print(f"接收到: {decoded_data}") # Received: {decoded_data} response = f"服务器接收到: {decoded_data}".encode('utf-8') # Server received: {decoded_data} conn.sendall(response) ``` **Client (client.py):** ```python import socket HOST = '127.0.0.1' # 服务器的主机名或 IP 地址 - The server's hostname or IP address PORT = 65432 # 服务器使用的端口 - The port used by the server with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s: s.connect((HOST, PORT)) message = "你好，服务器！" # Hello, Server! s.sendall(message.encode('utf-8')) data = s.recv(1024) print(f"接收到: {data.decode('utf-8')}") # Received: {data.decode('utf-8')} ``` **Chinese Translation of the `mcstatus` example:** ```python from mcstatus import JavaServer server = JavaServer.lookup("example.com:25565") # 替换为你的服务器地址 - Replace with your server address status = server.status() print(f"服务器有 {status.players.online} 个玩家在线") # The server has {status.players.online} players online ``` **Important Notes about the Chinese Translations:** * I've tried to provide accurate and natural-sounding translations. * The comments are translated to help understand the code's purpose. * Remember to replace `"example.com:25565"` with the actual address of the Minecraft server you want to connect to. This should give you a good starting point. Remember to install the `mcstatus` library if you want to use the Minecraft server status example: `pip install mcstatus`. Good luck!