def _is_under_root(self, full_path):
        """Guard against arbitrary file retrieval."""
        if (path.abspath(full_path) + path.sep)\
                .startswith(path.abspath(self.root) + path.sep):
            return True
        else:
            return False
def _is_under_root ( self , full_path ) : if ( path . abspath ( full_path ) + path . sep ) . startswith ( path . abspath ( self . root ) + path . sep ) : return True else : return False
Guard against arbitrary file retrieval.