Most pythonic way to port this tuple unpacking with lambda from Python 2 into Python 3

Question

I have the following Python 2 code which unpacks a tuple inside a lambda. This lambda is contained inside a for loop.

    for lab, lab_pred, length in zip(labels, labels_pred, sequence_lengths):
        accs += map(lambda (a, b): a == b, zip(lab, lab_pred))

What is the best way to port this into Python 3?

Answer 1

I think the best solution would be to not use map and lambda, use a list comprehension instead:

accs += [a == b for a, b in zip(lab, lab_pred)]

Answer 2

If you prefer functional style there is:

from operator import eq
from itertools import starmap

accs.extend(starmap(eq, zip(lab, lab_pred)))