What are the performance differences between deque and list in Python?

What are the performance differences between deque and list in Python?

In Python, a list is optimized for fast fixed-length operations, while a deque (double-ended queue) is optimized for fast appends and pops from both ends.

Can you explain when to use a deque instead of a list?

You should use a deque when you need to efficiently add or remove items from both ends of the collection, like in queue implementations.

What are the time complexities for common operations in both data structures?

For lists, appending is O(1) on average, but inserting or deleting from the front is O(n). For deques, appending and popping from both ends is O(1).