The use of the zip built-in is introduced with the strict keyword argument, however, that argument was not added until Python 3.10, so this code is incompatible with Python 3.9.

Notice that it has the order ('1', '10', '2') - this is because the list is being sorted in lexicographical order, which sorts numbers like you would letters (i.e. 'b', 'ba', 'c'). natsort provides a ...