How can I ensure thread safety when using a deque in Python?

How can I ensure thread safety when using a deque in Python?

To ensure thread safety with a deque in Python, you can use the threading module's locks. Wrap your deque operations with a lock to prevent race conditions.

Can you show me a code example of that?

Sure! Here's a simple example:

import threading
from collections import deque

# Create a deque and a lock
my_deque = deque()
lock = threading.Lock()

# Function to safely append to the deque
def safe_append(value):
    with lock:
        my_deque.append(value)

# Function to safely pop from the deque
def safe_pop():
    with lock:
        return my_deque.pop() if my_deque else None

What happens if I don't use a lock?

If you don't use a lock, multiple threads may modify the deque simultaneously, leading to inconsistent states or data loss.

Are there any built-in thread-safe collections in Python?

Yes, Python's queue.Queue is a built-in thread-safe collection that you can use instead of a deque for thread-safe operations.