What are the differences between a queue and a stack in Python?

What are the differences between a queue and a stack in Python?

A queue is a First-In-First-Out (FIFO) data structure, while a stack is a Last-In-First-Out (LIFO) structure.

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

Sure! You can use the queue module for queues and a list for stacks. Here's a quick example:

For a stack:

stack = []
stack.append(1)  # Push
stack.append(2)
print(stack.pop())  # Pop returns 2

For a queue:

from queue import Queue
queue = Queue()
queue.put(1)  # Enqueue
queue.put(2)
print(queue.get())  # Dequeue returns 1

What are the use cases for each data structure?

Stacks are often used in function calls and backtracking algorithms, while queues are used in scheduling and breadth-first search.

Are there any performance differences between them?

Both have O(1) time complexity for their main operations, but the choice depends on the specific use case and implementation.