How do I implement read-write locks in Python?

How do I implement read-write locks in Python?

You can use the threading module in Python, which provides a RLock class. Would you like a code example?

Yes, please provide a code example.

Here's a simple example:

import threading

class ReadWriteLock:
    def __init__(self):
        self.read_lock = threading.Lock()
        self.write_lock = threading.Lock()
        self.readers = 0

    def acquire_read(self):
        with self.read_lock:
            self.readers += 1
            if self.readers == 1:
                self.write_lock.acquire()

    def release_read(self):
        with self.read_lock:
            self.readers -= 1
            if self.readers == 0:
                self.write_lock.release()

    def acquire_write(self):
        self.write_lock.acquire()

    def release_write(self):
        self.write_lock.release()

How does this code ensure thread safety?

The ReadWriteLock class uses two locks: one for reading and one for writing. It ensures that multiple readers can access the resource simultaneously, but only one writer can access it at a time, preventing data corruption.