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'...