Generator for paste data

        Can be used in grid.actions.paste

def _get_paste_data_gen(self, key, data):
        """Generator for paste data

        Can be used in grid.actions.paste

        """

        if type(data) is wx._gdi.Bitmap:
            code_str = self.bmp2code(key, data)
            return [[code_str]]
        else:
            return (line.split("\t") for line in data.split("\n"))