For loop with 2 elements. No zip

[bowlofred]

The parentheses don't make a tuple, the comma does.

l = [1, 2, 3, 4]   # l is a list.  Iterating returns the 4 elements
(l)                # This is just a different expression of the list
(l,)               # this is a tuple with a single element (the list "l")

>>> len(l), type(l)
(4, <class 'list'>)
>>> len((l)), type((l))
(4, <class 'list'>)
>>> len((l,)), type((l,))
(1, <class 'tuple'>)

You can put any of them after the in in the loop designation and see how the elements will be iterated.