input: def sortDictionary(dictionary):
      """ Sorts the given dictionary according to its values in descending order.
      >>> sortDictionary({'apple': 2, 'banana': 3, 'mango': 1})
      {'banana': 3, 'apple': 2, 'mango': 1}
      """
      sorted_list = sorted(dictionary.items(), key=lambda x: x[1], reverse=True)
      sorted_dictionary = dict(sorted_list)
      return sorted_dictionary
output:     sorted_list = sorted(dictionary.items(), key=lambda x: x[1], reverse=True)
      sorted_dictionary = dict(sorted_list)
      return sorted_dictionary