What enumerate does

Question

What enumerate does

Accepted Answer

enumerate(iterable) yields (0, first_item), (1, second_item), and so on. You can also pass a start argument: enumerate(items, start=1) begins counting at 1. The idiom 'for i, val in enumerate(items)' is the Pythonic replacement for 'for i in range(len(items))' - it avoids the index-based lookup and makes the intent clear.