nit='S'))
    >>> ser
    0   0 days 00:00:01
    1   0 days 00:00:02
    2   0 days 00:00:03
    dtype: timedelta64[ns]
    >>> ser.dt.seconds
    0    1
    1    2
    2    3
    dtype: int32

    For TimedeltaIndex:

    >>> tdelta_idx = pd.to_timedelta([1, 2, 3], unit='S')
    >>> tdelta_idx
    TimedeltaIndex(['0 days 00:00:01', '0 days 00:00:02', '0 days 00:00:03'],
                   dtype='timedelta64[ns]', freq=None)
    >>> tdelta_idx.seconds
    Index([1, 2, 3], dtype='int32')rc