How do I use itertools.zip_longest in Python?

Can you explain how to use itertools.zip_longest in Python?

Sure! itertools.zip_longest is a function that takes multiple iterables and returns tuples containing elements from each iterable. If the iterables are of different lengths, it fills the shorter ones with a specified value.

What happens if the iterables have different lengths?

If the iterables have different lengths, zip_longest will fill the missing values with a specified fill value, which defaults to None.

Can you give me a code example?

Absolutely! Here's a simple example:

from itertools import zip_longest

list1 = [1, 2, 3]
list2 = ['a', 'b']
result = list(zip_longest(list1, list2, fillvalue='-'))
print(result)  # Output: [(1, 'a'), (2, 'b'), (3, '-')]```