How can I implement a queue using a deque in Python?

How can I implement a queue using a deque in Python?

You can use the collections.deque class in Python to implement a queue. It allows for efficient appends and pops from both ends.

Can you show me a simple code example?

Sure! Here's a basic example:

from collections import deque

queue = deque()

# Enqueue
queue.append('a')
queue.append('b')

# Dequeue
first = queue.popleft()  # 'a'
print(first)

What are the advantages of using deque over a list for queues?

The main advantage is performance. Deque provides O(1) time complexity for append and pop operations, while lists can be O(n) for pop from the front.

Are there any limitations I should be aware of?

Deque has a fixed size if you use it with a maximum length, but otherwise, it dynamically resizes. Just be cautious with memory usage.