For loops are a bit of a nuisance in Python. My other, and bigger problems with Python is the horrible significance of using indentation to create loops, and that variables get added mysteriously ...

When you want to create a loop in Python, you generally have two choices: the while loop and the for loop. while is simple: it just repeats until a given condition is no longer true.

Any construct which deals with iterators will be prepared for this, like the for loop in our example. When this is run, it correctly stops at the appropriate point. $ python iterator_test.py 463 ...