text: #!/usr/bin/env python
  
  import sys
  
  
  def is_none_or_empty(string):
      """ if string is empty or None, returns True - otherwise returns false """
      return not string
  
  
  if __name__ == '__main__':
      try:
          arg = sys.argv[1]
      except IndexError:
          arg = None
  
      print(is_none_or_empty(arg))
  