How to Iterate Over Consecutive Pairs in a List Using Built-in Python Iterators?

Consecutive Pairs in a List Using Built-in Python Iterators

Given a list and a desire to loop over pairs of consecutive items, such as (1,7) and (7,3), examining the itertools module for a solution comes to mind. However, a more efficient way to achieve this with built-in Python iterators exists.

The zip function seamlessly pairs consecutive elements from two sequences, creating a tuple for each pair. By supplying the input list both as the first and second arguments to zip, we obtain a generator that yields tuples containing pairs of consecutive items. For instance, for l = [1, 7, 3, 5], the output will be:

(1, 7)
(7, 3)
(3, 5)

In Python 2, consider employing izip from itertools for exceptionally long lists to optimize performance and prevent list creation.

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