如何在 GAE 应用程序中执行异步 api 请求？

我正在开发一个基于 GAE 和 python 2.7.13 的应用程序。我想做的是在处理程序内进行一堆异步 API 调用。像这样的东西：

class MakeRequests(webapp2.RequestHandler):
   def post(self, *v, **kv):
       *do an async api call#1*
       *do an async api call#2*
       *do an async api call#3*

       *wait for response from all of above api requests*
       *make response in a way like if call#1 failes, make it's expected*
       *attributes in response as None, if call#2 succeeds add it's*
       *attributes in response etc. This is just an example.*

为此，我尝试过类似的库asyncio, grequests, requests and simple-requests，它们似乎不起作用，因为它们与GAE或与python 2.7.13。 有人能帮我一下吗？

Urlfetch，默认与 GAE 捆绑在一起有一种进行异步调用的方法 https://cloud.google.com/appengine/docs/standard/python/issue-requests?csw=1#issuing_an_asynchronous_request:

from google.appengine.api import urlfetch

def post(self, *v, **kv):
  rpcs = []
  for url in urls:
    rpc = urlfetch.create_rpc()
    urlfetch.make_fetch_call(rpc, url)
    rpcs.append(rpc)

  results = [rpc.get_result() for rpc in rpcs]
  # do stuff with results

如果由于某种原因您不想使用 urlfetch，您可以使用以下命令手动并行化请求线程 https://docs.python.org/2/library/threading.html#thread-objects and a 同步队列 https://docs.python.org/2/library/queue.html读取结果。