What is the deque in Python's collections module?

Can you explain what a deque is in Python?

Sure! A deque, or double-ended queue, is a data structure from Python's collections module that allows you to add and remove elements from both ends efficiently.

What are some common use cases for using a deque?

Common use cases include implementing queues, stacks, and maintaining a sliding window of data, as it provides O(1) time complexity for appends and pops.

How do I create a deque and add elements to it?

You can create a deque by importing it from the collections module: from collections import deque. Then, you can add elements using append() or appendleft() methods.

Can I limit the size of a deque?

Yes, you can limit the size by passing a maximum length to the deque constructor, like this: deque(maxlen=5). This will automatically remove elements from the opposite end when the limit is reached.