clientmanager.py 文件源码

def __get__(self, instance, owner):
        # Tell the ClientManager to login to keystone
        if self._handle is None:
            try:
                self._handle = self.factory(instance)
            except AttributeError as err:
                # Make sure the failure propagates. Otherwise, the plugin just
                # quietly isn't there.
                new_err = exceptions.PluginAttributeError(err)
                six.reraise(new_err.__class__, new_err, sys.exc_info()[2])
        return self._handle