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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 cookie(self):
 """ Cookie values. """

        if self._cookie is None:
            self._cookie = self.arg_container()

            data = compat.parse_qs(self.http_header('cookie') or '')
            for k, v in data.items():
                self._cookie[k.strip()] = v[0]

        return self._cookie