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50 lines
1.2 KiB
Python
50 lines
1.2 KiB
Python
from datetime import datetime, timedelta, timezone
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class TimeZoneNotUTCError(Exception):
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pass
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def verify_UTC(dt: datetime) -> None:
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if dt.tzinfo is None or dt.tzinfo.utcoffset(dt) != timezone.utc.utcoffset(dt):
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raise TimeZoneNotUTCError(f"Datetime {dt} does not have a UTC time zone.")
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def convert_to_UTC(dt: datetime) -> datetime:
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if dt.tzinfo is None:
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return dt.replace(tzinfo=timezone.utc)
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return dt.astimezone(timezone.utc)
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def floor_to_hour(dt: datetime) -> datetime:
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verify_UTC(dt)
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return datetime(*dt.timetuple()[:4], tzinfo=timezone.utc)
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def floor_to_day(dt: datetime) -> datetime:
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verify_UTC(dt)
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return datetime(*dt.timetuple()[:3], tzinfo=timezone.utc)
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def ceiling_to_hour(dt: datetime) -> datetime:
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floor = floor_to_hour(dt)
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if floor == dt:
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return floor
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return floor + timedelta(hours=1)
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def ceiling_to_day(dt: datetime) -> datetime:
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floor = floor_to_day(dt)
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if floor == dt:
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return floor
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return floor + timedelta(days=1)
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def timestamp_to_datetime(timestamp: float) -> datetime:
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return datetime.fromtimestamp(float(timestamp), tz=timezone.utc)
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def datetime_to_timestamp(dt: datetime) -> int:
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verify_UTC(dt)
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return int(dt.timestamp())
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