def udf(row):
    print(row)
    print(row[0])
    print(row[1])
    return row

df = pl.DataFrame({'a': [1], 'b': [2]})
df = df.map_rows(udf)

gives output,

(1, 2)
1
2

but I would like to use the [] notation, is there a specific reason that it comes as a tuple by default as when I use,

def udf(row):
    print(row['a'])
    print(row['b'])
    return row
df = pl.DataFrame({'a': [1], 'b': [2]})
df = df.map_rows(udf)

I get

TypeError: tuple indices must be integers or slices, not str

how do I make the [] notation work for custom udfs?