When should I use deque from the collections module in Python?

What is the deque in Python's collections module?

Deque, or double-ended queue, is a data structure that allows you to add and remove elements from both ends efficiently.

When should I use deque instead of a list?

Use deque when you need fast appends and pops from both ends, as it has O(1) time complexity for these operations.

Can you give me an example of using deque?

Sure! You can use deque to implement a queue or a stack. For example, you can append items to the right and pop from the left.

Are there any limitations of using deque?

While deque is efficient for adding/removing elements, it uses more memory than lists due to its underlying structure.