What are the differences between queues and stacks in Python?

What are the main differences between queues and stacks in Python?

Queues and stacks are both data structures, but they operate differently. A stack follows the Last In First Out (LIFO) principle, meaning the last element added is the first to be removed. In contrast, a queue follows the First In First Out (FIFO) principle, where the first element added is the first to be removed.

Can you give me examples of how to implement both in Python?

Sure! For a stack, you can use a list and the append() method to add elements and pop() to remove them. For a queue, you can use the collections.deque class, which allows you to append elements to one end and pop them from the other.

What are some use cases for each data structure?

Stacks are often used in scenarios like undo mechanisms in applications, while queues are used in scenarios like task scheduling and managing requests in a server.

Are there any built-in libraries in Python for these data structures?

Yes, Python has built-in support for both. You can use the 'list' for stacks and 'collections.deque' for queues, which is optimized for fast appends and pops.