A short example of how to log output from a NXT device using python. and jaraco.nxt.

debug_logger.py

def log():
  print("Establishing connection...")
  conn = Connection(3, timeout=5)
  print('Logging output...')
  while True:
    print('Listening for output...')
    try:
      resp = conn.receive()
    except struct.error:
      print("Timed out")
      conn.close()
      time.sleep(1)
      conn.open()
    else:
      print(parse_message(resp))

def parse_message(msg):
  raw_content = msg.payload
  (msg_length,) = struct.unpack('B', raw_content[0])
  return raw_content[1:msg_length + 1]

if __name__ == '__main__':
  log()