docs: def get_in(d, t, default=None):
      """
      look up if you can get a tuple of values from a nested dictionary,
      each item in the tuple a deeper layer
  
      example: get_in({1: {2: 3}}, (1, 2)) -> 3
      example: get_in({1: {2: 3}}, (2, 3)) -> {}
      """
      result = reduce(lambda d, t: d.get(t, {}), t, d)
      if not result:
          return default
      else:
          return result