loop through a multi value variable in a calculation python3 code example

Example 1: multiple variables in for loop python

>>> for i, j in [(0, 1), ('a', 'b')]:
...     print('i:', i, 'j:', j)
...     
i: 0 j: 1
i: a j: b

Example 2: multiple variables in for loop python

for i, j in zip(range(x), range(y)):
    # Stuff...