import socket

TCP_IP = '127.0.0.1'
TCP_PORT = 1337
BUFFER_SIZE = 1024

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((TCP_IP,TCP_PORT))
s.listen(1)

conn, addr = s.accept()
print 'Connection address: ',addr
while 1:
    data = conn.recv(BUFFER_SIZE)
    if not data: break
    print 'received data: {}'.format(data)
    conn.send(data[::-1])
conn.close()