Manager

from multiprocessing import Manager,Process

def main(dic):
    dic['count'] -= 1
    print(dic)

if __name__ == '__main__':
    m = Manager()
    dic = m.dict({'count':100})
    p_dict = []
    p = Process(target=main,args=(dic,))
    p.start()
    p.join()
    print('主进程：',dic)

 

from multiprocessing import Manager,Process

def main(dic):
    dic['count'] -= 1


if __name__ == '__main__':
    m = Manager()
    dic = m.dict({'count':100})
    p_lst = []
    for i in range(50):
        p = Process(target=main,args=(dic,))
        p.start()
        p_lst.append(p)
    for p in p_lst: p.join()
    print('主进程：',dic)

 

from multiprocessing import Manager,Process,Lock

def main(dic,lock):
    lock.acquire()
    dic['count'] -= 1
    lock.release()


if __name__ == '__main__':
    m = Manager()
    lock = Lock()
    dic = m.dict({'count':100})
    p_lst = []
    for i in range(50):
        p = Process(target=main,args=(dic,lock))
        p.start()
        p_lst.append(p)
    for p in p_lst: p.join()
    print('主进程：',dic)