keys_and_values(d) that returns a tuple (keys_list, values_list) where keys_list is a list of d's keys and values_list is a list of d's values, both in the dict's natural iteration order.keys_and_values({'a': 1, 'b': 2})(['a', 'b'], [1, 2])
keys() and values() converted to lists, same order.
`list(d.keys())` and `list(d.values())`.