def between(start: datetime, end: datetime, tags: List[str]=[]) -> Iterable[Tuple[datetime, str]]:
"""Generate events from 'start' to 'end' (non-inclusive)
"""
for day in date_span(start, end):
for item in tag_filter(day_events(day), tags):
yield day, item
def on(day: datetime, tags: List[str]=[]) -> Iterable[Tuple[datetime, str]]:
"""Generate events for 'day', optionally filtered by tags."""
return tag_filter(day_events(day), tags)