موضوع قبلی

10. Lists

موضوع بعدی

12. حلقه‌های for

11. A character in a string

در دست انجام

Immediately after having introduced lists and selecting an item by its index, do the same for strings.

However, show the difference between mutable lists and immutable strings. Then, introduce tuples. Make sure to show that parentheses are NOT required for defining tuples -- and, in fact, show how to define a tuple with a single element.