Python uses sockets to implement TCP connections, send and receive data

Preparation work for environmental construction: 1. Install Python: If you have not already installed Python, please visit the official Python website（ https://www.python.org/ ）Download and install the latest version suitable for your operating system. Please ensure to add Python to the environment variable. 2. Ensure that the required class libraries are installed: As we will use the socket class library, which comes with Python, there is no need for additional installation. Dependent class libraries: In this example, the class library we are using is the socket class library that comes with Python. Example code: The following is a simple example program that demonstrates how to use sockets to achieve basic TCP connections, send and receive data. python import socket def create_tcp_socket(): ''' Create TCP Socket ''' return socket.socket(socket.AF_INET, socket.SOCK_STREAM) def connect_socket(sock, host, port): ''' Connect to the specified host and port ''' sock.connect((host, port)) def send_data(sock, data): ''' send data ''' sock.sendall(data.encode()) def receive_data(sock, buffer_size=1024): ''' receive data ''' data = sock.recv(buffer_size).decode() return data def close_socket(sock): ''' Close Socket Connection ''' sock.close() if __name__ == '__main__': #Setting Up Hosts and Ports HOST = '127.0.0.1' PORT = 8080 #Create TCP Socket tcp_socket = create_tcp_socket() #Connect to the specified host and port connect_socket(tcp_socket, HOST, PORT) #Sending data message = 'Hello, server!' send_data(tcp_socket, message) #Receiving data response = receive_data(tcp_socket) print('Received:', response) #Close Socket Connection close_socket(tcp_socket) Summary: In Python, using the socket class can facilitate TCP connections, sending, and receiving data. By creating a TCP socket and connecting to the specified host and port, then sending and receiving data, and finally closing the socket connection, TCP communication can be completed.