def existing_resource(self):
        self.ensure_client()
        if self._existing_resource:
            return self._existing_resource
        else:
            cur = dict(self)
            cur.pop('attributes', None)
            # We pop attributes because the query fails leaving them in
            try:
                # Site client of resource type because NSoT doesn't support
                # passing site_id as a query parameter
                site = getattr(
                    self.client.sites(self['site_id']),
                    self.resource_name,
                )
                lookup = get_result(site.get(**cur))
            except Exception as e:
                self.log_error(e)
                # There might be a better way to do this. If the NSoT server is
                # unreachable or otherwise the lookup fails it'll log properly
                # and return as if nothing exists. If the resource actually
                # exists but due to reachability it couldn't confirm some
                # action may be unnecessarily took user-side.
                #
                # Honestly, though, I think this is a decent trade-off
                self._existing_resource = {}
                return self._existing_resource

            existing = len(lookup) > 0
            if existing:
                # This is where state will be kept for this
                self._existing_resource = lookup[0]
                return self._existing_resource
            else:
                self._existing_resource = {}
                return self._existing_resource
Log current error, and send error output to client if possible
dataset/ETHPy150Open dropbox/pynsot/pynsot/models.py/Resource.existing_resource--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.2/django/core/servers/basehttp.py/ServerHandler.handle_error