python - 多处理帮助。 BrokenProcessPool 错误

Question

我正在尝试学习 python 中多处理的基础知识，并在网上找到了以下我想练习的示例。

import concurrent.futures
import time

def do_something(seconds):    
    print(f' Sleeping {seconds} seconds')
    time.sleep(seconds)
    return f'Done Sleeping {seconds}'

with concurrent.futures.ProcessPoolExecutor() as executor:
    f1 = executor.submit(do_something, 1)
    print(f1.result())

很简单，我知道。但是，出于某种原因，当我尝试运行它时，出现以下错误。

Traceback (most recent call last):

File "", line 19, in print(f1.result())

File "C:\Anaconda3\lib\concurrent\futures_base.py", line 432, in result return self.__get_result()

File "C:\Anaconda3\lib\concurrent\futures_base.py", line 384, in __get_result raise self._exception

BrokenProcessPool: A process in the process pool was terminated abruptly while the future was running or pending.

知道是什么原因造成的吗？

Answer 1

您可能想检查 future 是否已经完成:

if f1.done():
    print(f1.result())