There is df2 Pandas dataframe: surgery age rectal_temp pulse respiratory_rate extremities_temp pain outcome 4 2.0 1 NaN NaN NaN 2.0 2.0 1.0 6 1.0 1 NaN 60.0 NaN 3.0 NaN 2.0 7 2.0 1 NaN 80.0 36.0 3.0 4.0 3.0 15 1.0 9 NaN 128.0 36.0 3.0 4.0 2.0 27 1.0 1 NaN NaN NaN NaN NaN 2.0 33 1.0 1 NaN 100.0 30.0 3.0 5.0 1.0 34 2.0 1 NaN 104.0 24.0 4.0 4.0 3.0 39 1.0 1 NaN 88.0 NaN 3.0 5.0 2.0 Write a function that will replace all NaN values in the rectal_temp column with the median of that column

# df2 Pandas dataframe is given
def fillna_median(df2):
  df2['rectal_temp'] = df2['rectal_temp'].fillna(df2['rectal_temp'].median())
  return df2
  
fillna_median(df2)