Is there a way to repeat row values in a column in pandas?

My column looks like this:

XXXXXXXX
     NaN
     NaN
     NaN
YYYYYYYY
     NaN
     NaN
     NaN

Instead of NaN i want to repeat row value untill next value and so on.

XXXXXXXX
XXXXXXXX
XXXXXXXX
XXXXXXXX
YYYYYYYY
YYYYYYYY
YYYYYYYY
YYYYYYYY

>Solution :

df[column].fillna(method="ffill")

Check out the explanation and examples of available methods ({‘backfill’, ‘bfill’, ‘pad’, ‘ffill’, None}) from the doc https://pandas.pydata.org/docs/reference/api/pandas.DataFrame.fillna.html