What are the differences between Queue and Deque in Python?

What are the differences between Queue and Deque in Python?

In Python, a Queue is a FIFO (First In, First Out) data structure, while a Deque (Double-Ended Queue) allows insertion and deletion from both ends.

Can you give me an example of how to use both?

Sure! For a Queue, you can use queue.Queue() to create it. For a Deque, use collections.deque(). Here's a quick example:

from queue import Queue
from collections import deque

# Using Queue
q = Queue()
q.put(1)
q.put(2)
print(q.get())  # Outputs: 1

# Using Deque
d = deque()
d.append(1)
d.appendleft(2)
print(d.pop())  # Outputs: 1

When should I use one over the other?

Use Queue when you need strict FIFO behavior, like in task scheduling. Use Deque for more flexibility, like adding/removing items from both ends.

Are there performance differences between them?

Yes, Deques are generally faster for appending and popping from both ends compared to Queues, which are optimized for FIFO operations.