Series.str.rstrip(to_strip=None)

Series.ndim return the number of dimensions of the underlying data, by definition 1

Series.str()

Series.itemsize return the size of the dtype of the item of the underlying data

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

Series.dt.month The month as January=1, December=12

Series.nonzero()

Series.at_time(time, asof=False)

Series.view(dtype=None)

Series.autocorr(lag=1)