Learning Python Network Programming

A simple echo client

Create a file called 1.2-echo_client-uni.py and save the following code in it:

import sys, socket import tincanchat HOST = sys.argv[-1] if len(sys.argv) > 1 else '127.0.0.1' PORT = tincanchat.PORT if __name__ == '__main__': while True: try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.connect((HOST, PORT)) print('\nConnected to {}:{}'.format(HOST, PORT)) print("Type message, enter to send, 'q' to quit") msg = input() if msg == 'q': break tincanchat.send_msg(sock, msg) # Blocks until sent print('Sent message: {}'.format(msg)) msg = tincanchat.recv_msg(sock) # Block until # received complete # message print('Received echo: ' + msg) except ConnectionError: print('Socket error') break finally: sock.close() print('Closed ...