互斥锁和join的区别

from multiprocessing import Process
import time, json
def serch(name):
    dic = json.load(open('db.txt', 'r', encoding='utf-8'))
    print('%s查看到的票数为：%s'%(name, dic['count']))
def get(name):
    dic = json.load(open('db.txt', 'r', encoding='utf-8'))
    if dic['count'] >= 1:
        dic['count'] -= 1
        time.sleep(2)
        json.dump(dic, open('db.txt', 'w', encoding='utf-8'))
        print('%s抢票成功'%name)
    else:
        print('%s抢票失败'%name)
def task(name):
    serch(name)
    get(name)
if __name__ == '__main__':
    for i in range(10):
        p = Process(target=task, args=('路人%s'%i,))
        p.start()
        p.join()


# join和互斥锁的区别是join是整体串行，互斥锁可以部分串行， 换句话说就好比互斥锁可以保证最最先看到票的人有优先选择权，而join是等待一个人查票并抢票成功后才给其他人查票和抢票的权限。