MultiIndex.union(other)

MultiIndex.shift(periods=1, freq=None)

Series.dt.second The seconds of the datetime

Panel4D.where(cond, other=nan, inplace=False, axis=None, level=None, try_cast=False, raise_on_error=True)

DatetimeIndex.dayofyear The ordinal day of the year

TimedeltaIndex.ceil(freq)

Series.dt.is_quarter_start Logical indicating if first day of quarter (defined by frequency)

Series.dt.freq get/set the frequncy of the Index

GroupBy.std(ddof=1, *args, **kwargs)

CategoricalIndex.drop(labels, errors='raise')