from stem.control import Controller

with Controller.from_port(port = 9051) as controller:
  controller.authenticate()  # provide the password here if you set one

  bytes_read = controller.get_info("traffic/read")
  bytes_written = controller.get_info("traffic/written")

  print("My Tor relay has read %s bytes and written %s." % (bytes_read, bytes_written))