Series.count(level=None)

Series.eq(other, level=None, fill_value=None, axis=0)

Series.cat.codes

Series.str.zfill(width)

Series.str.ljust(width, fillchar=' ')

Series.asfreq(freq, method=None, how=None, normalize=False)

Series.dt.weekofyear The week ordinal of the year

Series.between(left, right, inclusive=True)

Series.ravel(order='C')

Series.last_valid_index()