new_contents: def read_device_file():
      from pathlib import Path
      event_files = Path('/dev/input/by-id').glob('*-event-kbd')
  
      for event_file in event_files:
          if '-if01-' not in event_file.name:
              break
  
      with event_file.open('rb') as events:
          while True:
              yield events.read(1)
  
  def listen(handlers):
      i = 0
      for byte in read_device_file():
          event = byte
          for handler in handlers:
              try:
                  if handler(event):
                      # Stop processing this hotkey.
                      return 1
              except Exception as e:
                  print(e)
  
  if __name__ == '__main__':
      listen([])
  
subject: Add initial structure for Unix support