Class Tick

xarray/coding/cftime_offsets.py:200–234

class Tick(BaseCFTimeOffset):
    # analogous https://github.com/pandas-dev/pandas/blob/ccb25ab1d24c4fb9691270706a59c8d319750870/pandas/_libs/tslibs/offsets.pyx#L806

    def _next_higher_resolution(self) -> Tick:
        self_type = type(self)
        if self_type is Day:
            return Hour(self.n * 24)
        if self_type is Hour:
            return Minute(self.n * 60)
        if self_type is Minute:
            return Second(self.n * 60)
        if self_type is Second:
            return Millisecond(self.n * 1000)
        if self_type is Millisecond:
            return Microsecond(self.n * 1000)
        raise ValueError("Could not convert to integer offset at any resolution")

    def __mul__(self, other: int | float) -> Tick:
        if not isinstance(other, int | float):
            return NotImplemented
        if isinstance(other, float):
            n = other * self.n
            # If the new `n` is an integer, we can represent it using the
            #  same BaseCFTimeOffset subclass as self, otherwise we need to move up
            #  to a higher-resolution subclass
            if np.isclose(n % 1, 0):
                return type(self)(int(n))

            new_self = self._next_higher_resolution()
            return new_self * other
        return type(self)(n=other * self.n)

    def as_timedelta(self) -> timedelta:
        """All Tick subclasses must implement an as_timedelta method."""
        raise NotImplementedError


def _get_day_of_month(other, day_option: DayOption) -> int: