comparaing row in pyspark data frame

[pseudo oduesp]

Hi,
how we can compare multiples columns in datframe i mean

if  df it s dataframe like that :

                           df.col1 | df.col2 | df.col3
                           0.2          0.3      0.4

how we can compare columns to get max of row not columns and get name of
columns where max it present ?

thanks