evalutator.state.metrics = {
    "a": 0,
    "dict_value": {
        "a": 111,
        "c": {"d": 23, "e": [123, 234]},
    },
    "list_value": [12, "13", {"aa": 33, "bb": 44}],
    "tuple_value": (112, "113", {"aaa": 33, "bbb": 44}),
}

handler = OutputHandler(
  tag="tag",
  metric_names="all",
)

handler(evaluator, tb_logger, event_name=Events.EPOCH_COMPLETED)
# Behind it would call `tb_logger.writer.add_scalar` on 
# {
#     "tag/a": 0,
#     "tag/dict_value/a": 111,
#     "tag/dict_value/c/d": 23,
#     "tag/dict_value/c/e/0": 123,
#     "tag/dict_value/c/e/1": 234,
#     "tag/list_value/0": 12,
#     "tag/list_value/1": "13",
#     "tag/list_value/2/aa": 33,
#     "tag/list_value/2/bb": 44,
#     "tag/tuple_value/0": 112,
#     "tag/tuple_value/1": "113",
#     "tag/tuple_value/2/aaa": 33,
#     "tag/tuple_value/2/bbb": 44,
# }