Как Python знает, когда остановить цикл for?

Python сильно полагается на отступы

# Below prints 1-5, sees that the next for line is not indented, doesn't read it
for x in range(5):
    print(x)

# there are other methods of breaking a python loop
for x in range(6):
    print(x)
 if x == 5:
         # break the loop
         break