Pythonsocket 服务端通信

Python socket编程 服务端如何向指定的客户端发消息呢

你在服务端监听指定客户端的IP就行了
客户端：

# echo-client.py

import socket

HOST = "127.0.0.1"  # 服务端的IP
PORT = 65432  # 服务端的端口

with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.connect((HOST, PORT))
    s.sendall(b"Hello, world")
    data = s.recv(1024)

print(f"Received {data!r}")

服务端：

# server.py

import socket

HOST = "127.0.0.1"  # 监听的固定客户端的IP
PORT = 65432  # 端口 > 1023)

with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.bind((HOST, PORT)) 
    s.listen()
    conn, addr = s.accept()
    with conn:
        print(f"Connected by {addr}")
        while True:
            data = conn.recv(1024)
            if not data:
                break
            conn.sendall(data)