input: Write a python function to compute the sum of values in a dictionary.
  assert compute_dict_sum({'a': 1, 'b': 2, 'c': 3}) == 6
  assert compute_dict_sum({'x': 10, 'y': 20, 'z': 30}) == 60
  assert compute_dict_sum({'key1': 5, 'key2': 15, 'key3': 25}) == 45
output: def compute_dict_sum(d):
      return sum(d.values())