When should I use a stack in Python?

When should I use a stack in Python?

You should use a stack when you need to manage data in a last-in, first-out (LIFO) manner, like in undo mechanisms.

Can you give me an example of a stack in action?

Sure! A common example is a web browser's back button, which uses a stack to keep track of your navigation history.

What are the main operations I can perform on a stack?

The main operations are push (to add an item), pop (to remove the top item), and peek (to view the top item without removing it).

Are there any built-in Python libraries for stacks?

Yes, you can use the collections.deque for stack operations, as it provides efficient appends and pops from both ends.