def add_tag(self, resource_type, resource_id, tag, **_params):
        """Add a tag on the resource."""
        return self.put(self.tag_path % (resource_type, resource_id, tag))
def add_tag ( self , resource_type , resource_id , tag , ** _params ) : return self . put ( self . tag_path % ( resource_type , resource_id , tag ) )
Add a tag on the resource.