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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _get_timezone(self, root):
 """Find timezone informatation on bottom of the page."""

        tz_str = root.xpath('//div[@class="smallfont" and @align="center"]')[0].text
        hours = int(self._tz_re.search(tz_str).group(1))
        return tzoffset(tz_str, hours * 60)