import time

from multiprocessing import Process,Manager,Lock

# a = 10

# # tmp = a

# # tmp -= 1

# # a = tmp

# a -= 1 # a = a - 1

def f1(m_d,l2):

    # m_d['num'] -= 1  #

    with l2:

        # l2.acquire()

        tmp = m_d['num']

        tmp -= 1

        time.sleep(0.1)

        m_d['num'] = tmp

        # l2.release()

if __name__ == '__main__':

    m = Manager()

    l2 = Lock()

    m_d = m.dict({'num':100})

    p_list = []

    for i in range(10):

        p = Process(target=f1,args=(m_d,l2))

        p.start()

        p_list.append(p)

    [pp.join() for pp in p_list]

    print(m_d['num'])