def quota_usage_get(context, project_id, resource, user_id=None):
 return IMPL.quota_usage_get(context, project_id, resource, user_id=user_id)

def quota_usage_get ( context , project_id , resource , user_id = None ) : return IMPL . quota_usage_get ( context , project_id , resource , user_id = user_id )
retrieve a quota usage or raise if it does not exist .