In [7]: list1 = (1, 2, 3)

In [8]: list2 = ("a", "b", "c", "d")

In [9]: for a in list1:
   ...:     for b in list2:
   ...:         print(a, b)
   ...:         print('1 a and 2 a is not supposed to show up')
   ...:
1 a
1 a and 2 a is not supposed to show up
1 b
1 a and 2 a is not supposed to show up
1 c
1 a and 2 a is not supposed to show up
1 d
1 a and 2 a is not supposed to show up
2 a
1 a and 2 a is not supposed to show up
2 b
1 a and 2 a is not supposed to show up
2 c
1 a and 2 a is not supposed to show up
2 d
1 a and 2 a is not supposed to show up
3 a
1 a and 2 a is not supposed to show up
3 b
1 a and 2 a is not supposed to show up
3 c
1 a and 2 a is not supposed to show up
3 d
1 a and 2 a is not supposed to show up