MultiIndex.fillna(value=None, downcast=None)

TimedeltaIndex.item()

GroupBy.__iter__()

Series.dt.dayofyear The ordinal day of the year

GroupBy.min()

DatetimeIndex.difference(other)

DatetimeIndex.argmin(axis=None, *args, **kwargs)

DatetimeIndex.data return the data pointer of the underlying data

DatetimeIndex.normalize()

DatetimeIndex.append(other)