def list_dtype(self, byte_order='='):
        '''
        Return the pair (len_dtype, val_dtype) (both numpy-friendly
        strings).
        '''
        return (byte_order + self.len_dtype,
                byte_order + self.val_dtype)

        Return the pair (len_dtype, val_dtype) (both numpy-friendly
        strings).
        
visualizer/plyfile.py