input: Write a function to sort dictionary keys in descending order.
  assert sort_dictionary_keys({'b': 1, 'a': 2, 'c': 3}) == {'c': 3, 'b': 1, 'a': 2}
  assert sort_dictionary_keys({3: 'three', 1: 'one', 2: 'two'}) == {3: 'three', 2: 'two', 1: 'one'}
  assert sort_dictionary_keys({}) == {}
output: def sort_dictionary_keys(d):
      return {k: d[k] for k in sorted(d.keys(), reverse=True)}