input: Write a function to sort a dictionary according to its values in descending order. If the dictionary is empty return an empty dictionary.
  def sortDictionary(dictionary):
    sorted_list = sorted(dictionary.items(), key=lambda x: x[1], reverse=True)
    sorted_dictionary = dict(sorted_list)
    return sorted_dictionary
  
  assert sortDictionary({'apple': 2, 'banana': 3, 'mango': 1}) == {'banana': 3, 'apple': 2, 'mango': 1}
  assert sortDictionary({'a': 5, 'b': 2, 'c': 10}) == {'c': 10, 'a': 5, 'b': 2}
  assert sortDictionary({'x': 1, 'y': 1, 'z': 1}) == {'x': 1, 'y': 1, 'z': 1}
  assert sortDictionary({}) == {}
output: def sortDictionary(dictionary):
    sorted_list = sorted(dictionary.items(), key=lambda x: x[1], reverse=True)
    sorted_dictionary = dict(sorted_list)
    return sorted_dictionary