def _tuple_to_tk_index(self, value):
        """
        Convert a (row, column) tuple to a tk index.
        :param value: value to convert
        :type value: tuple of (int, int)
        :return: the converted value
        :rtype: str
        """
        row, column = value
        return str(row + 1) + "." + str(column)

        Convert a (row, column) tuple to a tk index.
        :param value: value to convert
        :type value: tuple of (int, int)
        :return: the converted value
        :rtype: str
        
system/shui/tkui.py