breaks.py 文件源码

def __call__(self, limits):
        """
        Compute breaks

        Parameters
        ----------
        limits : tuple
            Minimum and maximum :class:`datetime.datetime` values.

        Returns
        -------
        out : array_like
            Sequence of break points.
        """
        if any(pd.isnull(x) for x in limits):
            return []

        ret = self.locator.tick_values(*limits)
        # MPL returns the tick_values in ordinal format,
        # but we return them in the same space as the
        # inputs.
        return [num2date(val) for val in ret]