我已经编写了一些代码来使用aiohttp / asyncio异步执行多个GET请求 . 之后，从结果中提取一些信息 . 我想把它放在烧瓶应用程序中 . 异步代码在通过 python script.py 执行时运行正常但是当我尝试在Flask路由中使用它时，它失败并返回错误 There is no current event loop in thread 'Thread-1' . Python 3.6，所有库都是最新的 . 任何帮助，将不胜感激！代码如下 .
注意：我已经尝试过不创建事件循环（未显示）和创建事件循环（ async_get 的第二行）都不起作用 .
异步代码属于一个类，相关的方法：
@staticmethod
async def fetch(url, session): # actually fetch the responses
async with session.get(url) as response:
resp = await response.read()
return resp
@staticmethod
async def get_requests(urls, hdr, cookie):
"""
create the list of tasks using a predefined header & cookie.
await on gather()
"""
tasks = []
async with ClientSession(headers=hdr, cookies=cookie) as session:
for url in urls:
task = asyncio.ensure_future(FetcherClass.fetch(url, session))
tasks.append(task)
res = await asyncio.gather(*tasks)
return res
def async_get(self, urls):
"""Retrieve a list of URL's
"""
hdr, cookie = self._auth.header_cookie()
loop = asyncio.new_event_loop()
asyncio.set_event_loop(loop)
future = asyncio.ensure_future(FetcherClass.get_requests(urls, hdr, cookie))
loop.run_until_complete(future)
return future.result()
示例（工作）
fc = FetcherClass()
fc.async_get(['http://google.com', 'http://yahoo.com'])
示例，（使用Flask失败）
fc = FetcherClass()
@app.route('/example')
def interviews():
# exception raised here
# There is no current event loop in thread ...
raw_data = fc.async_get(['http://google.com', 'http://yahoo.com'])
data = transform(raw_data)
res = Response(data, mimetype='text/csv')
res.headers['Content-Disposition'] = 'attachment; filename=interviews.csv'
return res
if __name__ == '__main__':
app.run(debug=True)