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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 notFound(self):
 """Render a page with a 404 return code and a message."""

        fmt = 'The path <q>%s</q> was not understood by this server.'
        msg = fmt % (self.path,)
        openid_url = self.query.get('openid_identifier')
        self.render(msg, 'error', openid_url, status=404)