使用 concurrent.futures.ProcessPoolExecutor() 时出现 BrokenProcessPool 错误消息的原因？

Question

我正在尝试运行在 Jupyter notebook 上执行以下代码（使用 Python 3.7.5）：

import time
import concurrent.futures

start = time.perf_counter()

def do_something(seconds):
    print(f'sleeping for {seconds} seconds')
    time.sleep(seconds)
    return 'done sleeping'

with concurrent.futures.ProcessPoolExecutor() as executor:
    results = [executor.submit(do_something, 1) for _ in range(10)]    
    for f in concurrent.futures.as_completed(results):
        print(f.result())

finish = time.perf_counter()

print(f'finished in  {round(finish-start,9)} seconds')

但是，解释器显示一条错误消息：

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

我正在通过 YouTube 教程学习多处理，该代码在该教程中运行良好。我没有找到任何讨论此错误的网页。

Answer 1

代码正确；但是它在 Jupyter 中不起作用。
根据 docs:

的预期行为

The main module must be importable by worker subprocesses. This means that ProcessPoolExecutor will not work in the interactive interpreter.

使用 concurrent.futures.ProcessPoolExecutor() 时出现 BrokenProcessPool 错误消息的原因？

Reaon of BrokenProcessPool error message while using concurrent.futures.ProcessPoolExecutor()?

python

python-multiprocessing

jupyter-notebook