How to apply a function to two columns of Pandas dataframe

Question

Suppose I have a df which has columns of \'ID\', \'col_1\', \'col_2\'. And I define a function :

f = lambda x, y : my_function_expres

Answer 1

My example to your questions:

def get_sublist(row, col1, col2):
    return mylist[row[col1]:row[col2]+1]
df.apply(get_sublist, axis=1, col1='col_1', col2='col_2')