From this page, you can subscribe to Weekly Python Exercise.
Weekly Python Exercise is a subscription service. While you’re subscribed, you’ll receive a new exercise every Tuesday and a solution to that exercise every Friday.
You’ll also have access to the Weekly Python Exercise forums, in which you can discuss (and compare) your answers with other subscribers, as well as find people with whom to pair program.
You can cancel at any time; if you cancel during the first month, I will give you a full refund. Otherwise, canceling means that your subscription will end at the conclusion of the most recently paid-for month.
Questions? Comments? Contact me, and ask away!