python lock的使用

import threading

def job1():
    global A, lock
    lock.acquire()
    for i in range(10):
        A += 1
        print('job1',A)
    lock.release()

def job2():
    global A,lock
    lock.acquire()
    for i in range(10):
        A += 10
        print('job2',A)
    lock.release()

if __name__ == '__main__':
    lock = threading.Lock()
    A = 0
    t1 = threading.Thread(target=job1)
    t2 = threading.Thread(target=job2)
    t1.start()
    t2.start()
    t1.join()
    t2.join()

result:

job1 1
job1 2
job1 3
job1 4
job1 5
job1 6
job1 7
job1 8
job1 9
job1 10
job2 20
job2 30
job2 40
job2 50
job2 60
job2 70
job2 80
job2 90
job2 100
job2 110