pandas.Series.align

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

Align two Series object with the specified join method

other : Series join : {‘outer’, ‘inner’, ‘left’, ‘right’}, default ‘outer’ level : int or name

Broadcast across a level, matching Index values on the passed MultiIndex level
copy : boolean, default True
Always return new objects. If copy=False and no reindexing is required, the same object will be returned (for better performance)

fill_value : object, default None method : str, default ‘pad’ limit : int, default None

fill_value, method, inplace, limit are passed to fillna
(left, right) : (Series, Series)
Aligned Series