Also read: How to use lists in Python This is not an array, however. That’s because an array is a data structure that uses an “index” or “key” to store each value.

To do this, you use Python’s index notation: a number in brackets, starting at 0, that indicates the position of the item in the list. In the list_of_ints example, ...

How you choose to do this impacts how efficiently indexing platforms crawl your website and, thus, your content visibility. Here are four ways to optimize XML sitemaps: 1.