我试图从博客商店获取图片的网址。在使用webapp2和python。
我这样做：
from google.appengine.api.images import get_serving_url_async
...
upload = self.get_uploads()[0]
blob_key = upload.key()
url = yield get_serving_url_async(blob_key, secure_url = True)
我收到错误消息：
> Traceback (most recent call last):
>
> File "C:\Program Files
> (x86)\Google\google_appengine\lib\webapp2-2.3\webapp2.py", line 1522,
> in __call__
>
> return response(environ, start_response)
>
> TypeError: 'generator' object is not callable
>
> ERROR 2016-04-29 20:02:28,489 wsgi.py:279]
>
> Traceback (most recent call last):
>
> File "C:\Program Files
> (x86)\Google\google_appengine\google\appengine\runtime\wsgi.py", line
> 267, in Handle
>
> result = handler(dict(self._environ), self._StartResponse)
>
> File "C:\Program Files
> (x86)\Google\google_appengine\lib\webapp2-2.3\webapp2.py", line 1524,
> in __call__
>
> return self._internal_error(e)(environ, start_response)
>
> File "C:\Program Files
> (x86)\Google\google_appengine\lib\webapp2-2.3\webapp2.py", line 1522,
> in __call__
>
> return response(environ, start_response)
>
> TypeError: 'generator' object is not callable
使用时一切正常：
url = get_serving_url(blob_key, secure_url = True)
我找不到获取异步下载网址的方法。
有人知道错误在哪里吗？网络上关于如何运作的内容很少。
感谢。