pycharm中多进程踩坑记录--Python

# --coding: utf-8 --
# @User: JasonHU
# @Time: 2020/11/25 21:11
# @IDE: Pycharm
# author: hzc
import multiprocessing as mp
import time


class test:
    def __init__(self, x):
        self.x = x

    def printf(self):
        print(self.x)



def foo_pool(x, y):
    time.sleep(5)
    instance = test(x * x + y)
    return instance


result_list = []


def log_result(result):
    # This is called whenever foo_pool(i) returns a result.
    # result_list is modified only by the main process, not the pool workers.
    # result_list.append(result)
    print(type(result))


def apply_async_with_callback():
    pool = mp.Pool(1)
    for i in range(10):
        pool.apply_async(foo_pool, args=(i, 2), callback=log_result)
    pool.close()
    pool.join()
    print(result_list)


if __name__ == '__main__':
    apply_async_with_callback()