def xzver(self, range=None):
return [x for x in self.xzver_gen(range)]<EOL>
XZVER command.

        The XZVER command returns information from the overview database for
        the article(s) specified. It is part of the compressed headers
        extensions that are supported by some usenet servers. It is the
        compressed version of the XOVER command.

        <http://helpdesk.astraweb.com/index.php?_m=news&_a=viewnews&newsid=9>

        Args:
            range: An article number as an integer, or a tuple of specifying a
                range of article numbers in the form (first, [last]). If last is
                omitted then all articles after first are included. A range of
                None (the default) uses the current article.

        Returns:
            A list of fields as given by the overview database for each
            available article in the specified range. The fields that are
            returned can be determined using the LIST OVERVIEW.FMT command if
            the server supports it.

        Raises:
            NNTPTemporaryError: If no such article exists or the currently
                selected newsgroup is invalid.
            NNTPDataError: If the compressed response cannot be decoded.