Ich habe den folgenden Code mitasyncio undaiohttp um asynchrone HTTP-Anfragen zu stellen.

import sys
import asyncio
import aiohttp

@asyncio.coroutine
def get(url):
    try:
        print('GET %s' % url)
        resp = yield from aiohttp.request('GET', url)
    except Exception as e:
        raise Exception("%s has error '%s'" % (url, e))
    else:
        if resp.status >= 400:
            raise Exception("%s has error '%s: %s'" % (url, resp.status, resp.reason))

    return (yield from resp.text())

@asyncio.coroutine
def fill_data(run):
    url = 'http://www.google.com/%s' % run['name']
    run['data'] = yield from get(url)

def get_runs():
    runs = [ {'name': 'one'}, {'name': 'two'} ]
    loop = asyncio.get_event_loop()
    task = asyncio.wait([fill_data(r) for r in runs])
    loop.run_until_complete(task)   
    return runs

try:
    get_runs()
except Exception as e:
    print(repr(e))
    sys.exit(1)

Aus irgendeinem Grund werden Ausnahmen imget Funktion werden nicht gefangen:

Future/Task exception was never retrieved
Traceback (most recent call last):
  File "site-packages/asyncio/tasks.py", line 236, in _step
    result = coro.send(value)
  File "mwe.py", line 25, in fill_data
    run['data'] = yield from get(url)
  File "mwe.py", line 17, in get
    raise Exception("%s has error '%s: %s'" % (url, resp.status, resp.reason))
Exception: http://www.google.com/two has error '404: Not Found'

So, was ist die richtige Art, mit Ausnahmen umzugehen, die von Couroutines ausgelöst werden?