In [21]: pd.Series.pad?
Signature:
pd.Series.pad(
self: 'FrameOrSeries',
axis=None,
inplace: 'bool_t' = False,
limit=None,
downcast=None,
) -> 'Optional[FrameOrSeries]'
Docstring:
Synonym for :meth:`DataFrame.fillna` with ``method='ffill'``.
Returns
-------
{klass} or None
Object with missing values filled or None if ``inplace=True``.