docs: def put_nested_val(dict_obj, key_tuple, value):
      """Put a value into nested dicts by the order of the given keys tuple.
  
      Any missing intermediate dicts are created.
  
      Parameters
      ----------
      dict_obj : dict
          The outer-most dict to put in.
      key_tuple : tuple
          The keys to use for putting, in order.
      value : object
          The value to put.
  
      Example
      -------
      >>> dict_obj = {'a': {'h': 3}}
      >>> put_nested_val(dict_obj, ('a', 'b'), 7)
      >>> dict_obj['a']['b']
      7
      >>> put_nested_val(dict_obj, ('a', 'b'), 12)
      >>> dict_obj['a']['b']
      12
      >>> put_nested_val(dict_obj, ('a', 'g', 'z'), 14)
      >>> dict_obj['a']['g']['z']
      14
      >>> put_nested_val(dict_obj, ['base'], 88)
      >>> dict_obj['base']
      88
      """
      current_dict = dict_obj
      for key in key_tuple[:-1]:
          try:
              current_dict = current_dict[key]
          except KeyError:
              current_dict[key] = {}
              current_dict = current_dict[key]
      current_dict[key_tuple[-1]] = value