def _get_formatted_val(self, obj, attribute, column):
        """
        Return the formatted value of the attribute "attribute" of the obj "obj"
        regarding the column's description

        :param obj obj: The instance we manage
        :param str attribute: The string defining the path to access the end
        attribute we want to manage
        :param dict column: The column description dictionnary
        :returns: The associated value
        """
        attr_path = attribute.split('.')
        val = None
        tmp_val = obj
        for attr in attr_path:
            tmp_val = getattr(tmp_val, attr, None)
            if tmp_val is None:
                break
        if tmp_val is not None:
            val = tmp_val

        value = format_value(column, val, self.config_key)
        return format_py3o_val(value)
Return the formatted value of the attribute "attribute" of the obj "obj"
        regarding the column's description

        :param obj obj: The instance we manage
        :param str attribute: The string defining the path to access the end
        attribute we want to manage
        :param dict column: The column description dictionnary
        :returns: The associated value