How to create a global variable in a loop so that after exiting the loop it exists?

Question

Python

for event in pygame.event.get():
    if event.type == pygame.MOUSEBUTTONUP:
        global one, two
        one, two = 1,2
print(one, two)
"one" isn't defined. Почему?

Answer 1

lol = None
for x in []: lol = 1
print(lol)