python多进程通信和字符串传递

from multiprocessing import Process,Event,Array
import os
import time

# src : 输入共享内存地址
# res : 输出共享内存地址
# i   : 任务编号
# es  : 任务开始事件
# ef  : 任务结束事件
def work(src,res,i,es,ef):
    while True:
        es.wait()
        time.sleep(2) # 模拟任务执行时间
        res.get_obj().value = str(int(src.get_obj().value)+i)
        print("%d,%d,%s,%s"%(os.getpid(),i,src.get_obj().value,res.get_obj().value))
        es.clear()
        ef.set()

task_num = 3
srcs = [Array('u',500) for _ in range(task_num)]
ress = [Array('u',500) for _ in range(task_num)]

init_str = '10'
for src in srcs:
    src.get_obj().value = init_str
for res in ress:
    res.get_obj().value = init_str

start_events = [Event() for _ in  range(task_num)]
finish_events = [Event() for _ in range(task_num)]

ps = [Process(target=work,args=(srcs[i],ress[i],i,start_events[i],finish_events[i])) for i in range(task_num)]

for p in ps:
    p.start()

for i in range(10):
    start = time.time()
    for j in range(task_num):
        srcs[j].get_obj().value = str(int(srcs[j].get_obj().value)+1)
        finish_events[j].clear()  #将任务完成状态设置为否
        start_events[j].set()    #将任务开始状态设置为是

    for j in range(task_num):
        finish_events[j].wait() #等待事件结束

    time_sp = time.time() - start
    print("res:",[r.get_obj().value for r in ress],time_sp)

#结束进程
for p in ps:
    try:
        p.close()
    except:
        p.terminate()