The Backend API is deprecated as of March 13, 2014. Although Google will continue to support the Backend API in accordance with our terms of service, it is strongly recommended that all new applications use the Modules API instead.

The google.appengine.api.backends package provides the following exception classes:

exception DefaultHostnameError()

Raised if no default hostname is set in the environment.

exception InvalidBackendError()

Raised if an invalid backend name was provided.

exception InvalidInstanceError()

Raised if an invalid instance parameter was provided.