无法使用上下文管理器捕获线程中的异常

如何解决无法使用上下文管理器捕获线程中的异常

目标脚本

from threading import Thread
import instrument
import sys

args=None
def main():
    function1()


def function1():
     with open("help11.txt") as f:
          print(f.read())

if __name__ == "__main__":
    with instrument.FooManager():
        t= Thread(target=main)
        t.start()
        t.join()

上下文管理器定义Instrument.py

class FooManager(object):

    def __init__(self,**kwargs):
         self.kwargs = kwargs

    def __enter__(self):
        self.start_time,self.fmt_start_time = self.__timings()

    def __exit__(self,exc_type,exc_value,traceback):
        print(exc_type)
        print(exc_value)
        self.end_time,self.fmt_end_time = self.__timings()
        duration = (self.end_time - self.start_time)
        print("start_time",self.start_time)
        print("end_time",self.end_time)
        print("duration",duration)

    def __timings(self):

       return time.time(),time.strftime('%Y-%m-%d %H:%M %Z',time.gmtime(time.time()))

实际输出

Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib/python3.6/threading.py",line 916,in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.6/threading.py",line 864,in run
    self._target(*self._args,**self._kwargs)
  File "test.py",line 10,in main
    function1(10000000,1)
  File "test.py",line 14,in function1
    with open("help11.txt") as f:
FileNotFoundError: [Errno 2] No such file or directory: 'help11.txt'

None
None
fmt_start_time 1602782848.645685
end_time 1602782848.6461706
duration 0.0004856586456298828

预期产量

我想要的是使用上下文管理器以某种方式捕获错误，而不是在exc_type和exc_value中获取值为None或捕获上下文管理器中的线程引发的错误的推荐方法

注意：当“ with语句”之后没有线程声明时，此代码可以正常工作

解决方法

要传播线程中的异常，请使用ThreadPoolExecutor中的concurrent.futures

from concurrent.futures.thread import ThreadPoolExecutor


def foo():
    raise RuntimeError()


with ThreadPoolExecutor(max_workers=1) as executor:
    future = executor.submit(foo)
    print(future.result())