How can I use deque in multithreading with Python?

How can I use deque in multithreading with Python?

You can use collections.deque for thread-safe operations in multithreading. It allows you to append and pop items efficiently.

Can you show me a code example?

Sure! Here's a simple example:

from collections import deque
import threading

# Create a deque
my_deque = deque()

# Function to add items to the deque
def add_items():
    for i in range(5):
        my_deque.append(i)
        print(f'Added {i}')

# Function to remove items from the deque
def remove_items():
    for _ in range(5):
        item = my_deque.popleft()
        print(f'Removed {item}')

# Create threads
add_thread = threading.Thread(target=add_items)
remove_thread = threading.Thread(target=remove_items)

# Start threads
add_thread.start()
remove_thread.start()

# Wait for threads to finish
add_thread.join()
remove_thread.join()

What happens if I try to pop from an empty deque?

If you try to pop from an empty deque, it will raise an IndexError. You can check if it's empty using if not my_deque: before popping.

Are there any performance considerations I should be aware of?

Yes, while deque is optimized for fast appends and pops, be cautious with the number of threads accessing it simultaneously, as it can lead to contention.