pandas.Series.ffill

Series.ffill(self: ~ FrameOrSeries, axis=None, inplace: bool = False, limit=None, downcast=None) → Union[~FrameOrSeries, NoneType]

Synonym for DataFrame.fillna() with method='ffill'.

Returns

%(klass)s or None

Object with missing values filled or None if inplace=True.

pandas.Series.factorize pandas.Series.fillna