code: def fancy_handler(signum, frame, spinner):
      
      spinner.red.fail("✘")
      spinner.stop()
      sys.exit(0)
docs: Signal handler, used to gracefully shut down the ``spinner`` instance
      when specified signal is received by the process running the ``spinner``.
  
      ``signum`` and ``frame`` are mandatory arguments. Check ``signal.signal``
      function for more details.