Series.cat.codes

Series.align(other, join='outer', axis=None, level=None, copy=True, fill_value=None, method=None, limit=None, fill_axis=0, broadcast_axis=None)

Series.nonzero()

Series.__iter__()

Series.dt.weekofyear The week ordinal of the year

Series.mode()

Series.all(axis=None, bool_only=None, skipna=None, level=None, **kwargs)

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

Series.view(dtype=None)

Series.str.split(pat=None, n=-1, expand=False)