Python 使用asyncio时，重新引发的异常的回溯长度正在增加

在这种情况下，协同程序依赖于另一个协同程序。如果给定依赖项中发生异常，所有依赖项都应停止并记录回溯。然而，随着异常被重新引发，回溯变得越来越长

#编码：utf-8
导入异步
导入回溯
异步定义资源（）：
返回7/0
异步def工作程序（依赖项）：
打印（'等待依赖项'）
尝试：
等待依赖
例外情况除外，如e：
打印（'Worker-crasted:\n'+traceback.format\u exc（））
异步def主（循环）：
依赖项=循环。创建任务（资源（））
workers=[loop.create_任务（worker（dependency）），用于范围（4）内的u
return wait asyncio.wait（workers，loop=loop）
如果uuuu name uuuuuu='\uuuuuuu main\uuuuuuu'：
loop=asyncio.get\u event\u loop（）
循环。运行_直到_完成（主循环））
loop.stop（）
loop.close（）

对于第一次运行，回溯如下所示：

waiting on a dependency
Worker crashed:
Traceback (most recent call last):
  File "/home/slapec/scripts/sandbox/exc.py", line 13, in worker
    await dependency
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 360, in __iter__
    return self.result()  # May raise too.
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 274, in result
    raise self._exception
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py", line 239, in _step
    result = coro.send(None)
  File "/home/slapec/scripts/sandbox/exc.py", line 7, in resource
    return 7 / 0
ZeroDivisionError: division by zero

    waiting on a dependency
Worker crashed:
Traceback (most recent call last):
  File "/home/slapec/scripts/sandbox/exc.py", line 13, in worker
    await dependency
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 360, in __iter__
    return self.result()  # May raise too.
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 274, in result
    raise self._exception
  File "/home/slapec/scripts/sandbox/exc.py", line 13, in worker
    await dependency
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 360, in __iter__
    return self.result()  # May raise too.
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 274, in result
    raise self._exception
  File "/home/slapec/scripts/sandbox/exc.py", line 13, in worker
    await dependency
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 360, in __iter__
    return self.result()  # May raise too.
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 274, in result
    raise self._exception
  File "/home/slapec/scripts/sandbox/exc.py", line 13, in worker
    await dependency
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 360, in __iter__
    return self.result()  # May raise too.
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 274, in result
    raise self._exception
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py", line 239, in _step
    result = coro.send(None)
  File "/home/slapec/scripts/sandbox/exc.py", line 7, in resource
    return 7 / 0
ZeroDivisionError: division by zero

在第四次迭代之后，它是这样的：

waiting on a dependency
Worker crashed:
Traceback (most recent call last):
  File "/home/slapec/scripts/sandbox/exc.py", line 13, in worker
    await dependency
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 360, in __iter__
    return self.result()  # May raise too.
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 274, in result
    raise self._exception
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py", line 239, in _step
    result = coro.send(None)
  File "/home/slapec/scripts/sandbox/exc.py", line 7, in resource
    return 7 / 0
ZeroDivisionError: division by zero

    waiting on a dependency
Worker crashed:
Traceback (most recent call last):
  File "/home/slapec/scripts/sandbox/exc.py", line 13, in worker
    await dependency
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 360, in __iter__
    return self.result()  # May raise too.
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 274, in result
    raise self._exception
  File "/home/slapec/scripts/sandbox/exc.py", line 13, in worker
    await dependency
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 360, in __iter__
    return self.result()  # May raise too.
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 274, in result
    raise self._exception
  File "/home/slapec/scripts/sandbox/exc.py", line 13, in worker
    await dependency
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 360, in __iter__
    return self.result()  # May raise too.
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 274, in result
    raise self._exception
  File "/home/slapec/scripts/sandbox/exc.py", line 13, in worker
    await dependency
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 360, in __iter__
    return self.result()  # May raise too.
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/futures.py", line 274, in result
    raise self._exception
  File "/home/slapec/.pyenv/versions/3.5.1/lib/python3.5/asyncio/tasks.py", line 239, in _step
    result = coro.send(None)
  File "/home/slapec/scripts/sandbox/exc.py", line 7, in resource
    return 7 / 0
ZeroDivisionError: division by zero

虽然它不是真正的异步特定的，但我以前从未见过这种行为

---

你知道如何保持原始的追踪吗？我有一种感觉，堆栈帧也被存储，因此长时间运行的循环会消耗我所有的内存。

在python3.6中，回溯稍微短一些，但仍然可以包含等待相同依赖项的所有

wait

s。