Python 201 - Interactively Learn Advanced Concepts in Python 3/

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Locks and Logging

Locks and Logging

Let's see how locks and logging work using the multiprocessing module.

We'll cover the following...

Lock

The multiprocessing module supports locks in much the same way as the threading module does. All you need to do is import Lock, acquire it, do something and release it.

How multiprocessing module supports locks

Let’s take a look:

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from multiprocessing import Process, Lock
def printer(item, lock):
    """
    Prints out the item that was passed in
    """
    lock.acquire()
    try:
        print(item)
    finally:
        lock.release()
if __name__ == '__main__':
    lock = Lock()
    items = ['tango', 'foxtrot', 10]
    for item in items:
        p = Process(target=printer, args=(item, lock))
        p.start()

Here we create a simple printing ...