daft.functions.datepart#

def datepart(part: str, expr: Expression) -> Expression:
    """Alias-style extractor over existing temporal functions.

    Args:
        part: Date part name, e.g. ``"year"``, ``"dayofmonth"``, ``"weekofyear"``.
        expr: Temporal expression to extract from.
    """
    normalized = part.strip().lower().replace(" ", "_")
    extractors = {
        "date": date,
        "year": year,
        "quarter": quarter,
        "month": month,
        "day": day,
        "day_of_week": day_of_week,
        "dayofweek": day_of_week,
        "weekday": day_of_week,
        "day_of_month": day_of_month,
        "dayofmonth": day_of_month,
        "day_of_year": day_of_year,
        "dayofyear": day_of_year,
        "week_of_year": week_of_year,
        "weekofyear": week_of_year,
        "week": week_of_year,
        "hour": hour,
        "minute": minute,
        "second": second,
        "millisecond": millisecond,
        "microsecond": microsecond,
        "nanosecond": nanosecond,
        "unix_date": unix_date,
    }
    if normalized not in extractors:
        supported = ", ".join(sorted(extractors))
        raise ValueError(f"Unsupported datepart value: {part!r}. Supported values: {supported}")
    return extractors[normalized](expr)