Yields all the attribute values in xml files which match with the tag name and the specific attribute

        :param str tag_name: specify the tag name
        :param str attribute: specify the attribute
        :param bool format_value: specify if the value needs to be formatted with packagename

def get_all_attribute_value(
        self, tag_name, attribute, format_value=True, **attribute_filter
    ):
        """
        Yields all the attribute values in xml files which match with the tag name and the specific attribute

        :param str tag_name: specify the tag name
        :param str attribute: specify the attribute
        :param bool format_value: specify if the value needs to be formatted with packagename
        """
        tags = self.find_tags(tag_name, **attribute_filter)
        for tag in tags:
            value = tag.get(attribute) or tag.get(self._ns(attribute))
            if value is not None:
                if format_value:
                    yield self._format_value(value)
                else:
                    yield value