Replacing values greater than a number in pandas dataframe

Question

I have a large dataframe which looks as:

df1[\'A\'].ix[1:3]
2017-01-01 02:00:00    [33, 34, 39]
2017-01-01 03:00:00    [3, 43, 9]

I want to

Answer 1

Very simply : df[df > 9] = 11