rounder v0.4.1` handles many built-in types: `int`, `float`, `complex`, `set`, `frozenset`, `list`, `tuple`, `collections.namedtuple`, `typing.NamedTuple`, `dict`, `collections.defaultdict`, `collections.OrderedDict`, `collections.UserDict`, `collections.Counter`, `collections.deque`, `array.array`, and `collections.abc.Mapping`.