new_contents: #!/usr/bin/env python
  
  import sys
  
  def arg_to_dict():
      """
      python program.py key1:val1 key2:val2 key3:val3
      dict = {'key3': 'val3', 'key2': 'val2', 'key1': 'val1'}
      :return:
      """
      dict = {}
      for arg in sys.argv[1:]:
          key, val = arg.split(':')[0], arg.split(':')[1]
          dict[key] = val
      return dict
  
  if __name__ == "__main__":
      arg_dict = arg_to_dict()
      print(arg_dict)
  
subject: add arg_to_dict