What is the difference between a list and a deque?

What is the difference between a list and a deque in Python?

A list is a dynamic array that allows random access, while a deque (double-ended queue) allows fast appends and pops from both ends.

Can you give me an example of when to use a deque instead of a list?

Sure! Use a deque when you need to efficiently add or remove items from both ends, like in a queue or stack implementation.

Are there any performance differences between them?

Yes, lists have O(1) time complexity for access but O(n) for insertions/removals at the beginning, while deques have O(1) for both ends.

What about memory usage? Is one more efficient than the other?

Lists generally use less memory than deques for small sizes, but deques can be more memory-efficient for larger sizes due to their structure.