python的ThreadPoolExecutor线程超时时间
时间: 2024-05-10 20:13:26 浏览: 350
python中设置超时跳过,超时退出的方式
ThreadPoolExecutor是Python自带的线程池库,可以在多线程任务处理中实现并发操作。ThreadPoolExecutor类中提供了一个参数timeout,用于设置线程超时时间。该参数的作用是,如果一个线程的执行时间超过了timeout指定的时间,则会被强制终止。
具体使用方式如下:
```
from concurrent.futures import ThreadPoolExecutor, wait, FIRST_COMPLETED
import time
def task(n):
print('Task %s: start' % n)
time.sleep(n)
print('Task %s: end' % n)
return n
def main():
with ThreadPoolExecutor(max_workers=2) as executor:
# submit 2 tasks
future1 = executor.submit(task, 2)
future2 = executor.submit(task, 4)
# wait for either task to complete
done, not_done = wait([future1, future2], timeout=3, return_when=FIRST_COMPLETED)
# check if future1 completed
if future1 in done:
print('Future1 completed with result %s' % future1.result())
else:
print('Future1 did not complete')
# check if future2 completed
if future2 in done:
print('Future2 completed with result %s' % future2.result())
else:
print('Future2 did not complete')
if __name__ == '__main__':
main()
```
在上面的代码中,我们创建了一个ThreadPoolExecutor对象,并提交了两个任务。我们将timeout设置为3秒,意味着如果任务执行时间超过3秒,它们会被强制终止。
相关问题:
1. Python还有哪些线程池库可以使用?
2. 如何使用ThreadPoolExecutor处理多个任务?
3. Python中如何处理线程中的异常?
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