What are lock and rlock in Python?

Can you explain what lock and rlock are in Python?

Sure! In Python, a lock is a synchronization primitive that is used to ensure that only one thread can access a resource at a time.

What about rlock? How is it different from a regular lock?

An rlock, or reentrant lock, allows a thread to acquire the lock multiple times without causing a deadlock. It's useful when a thread needs to call a function that requires the same lock.

Can you give me a code example of using lock and rlock?

Absolutely! Here's a simple example:

import threading

# Using a lock
lock = threading.Lock()

def thread_function():
    with lock:
        # critical section
        print('Lock acquired')

# Using an rlock
rlock = threading.RLock()

def reentrant_function():
    with rlock:
        # critical section
        print('RLock acquired')
        reentrant_function()  # can call itself