How to exit a function from another function?

I want to exit a function in another function if statement is True. I am using multiprocessing so they are running concurrently.

I want to make something like this:

def A():
    while True:
        if condition is True:
            #do something
        else:
            True

def B():
    while True:
        if condition is True:
            #stop A() function
        else:
            True

def main():
    p1 = multiprocessing.Process(target=A())
    p2 = multiprocessing.Process(target=B())
    p1.start()
    p2.start()
    p1.join()
    p2.join()

if __name__ == '__main__':
    main()

>Solution :

There are multiple synchronization primitives you could use, such as a condition variable:

You could use a mp.Condition() calling

while not predicate():
    cv.wait()

in A() and notify() in B()