import argparse
import dataclasses
import datetime
import logging
import sys
from collections.abc import Iterator, Sequence
from pathlib import Path

HIDDEN_LABEL_PREFIX = '__'
HIDDEN_LABEL_TOTAL = HIDDEN_LABEL_PREFIX + 'TOTAL'

@dataclasses.dataclass(frozen=True, order=True)
class WorkSample:
    registered_at: datetime.datetime
    labels: Sequence[str]