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Trying to Import background_thread from google.appengine.api (like in example) fails with ImportError

Simply doing...

from google.appengine.api import background_thread

...like in the official documentation , fails for me with...

<type 'exceptions.ImportError'>: cannot import name background_thread

...when calling it from my backend.

How do I get this to import properly?

It's a Python 2.7 only feature. Also it's not supported in the SDK.

它仅可在Python 2.7上使用,并且在开发服务器中不受支持(如@Guido van Rossum所说),只是将其上传到GAE服务器上

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