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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 submit(self, stanza):
 """Adds keys to the current configuration stanza as a dictionary of key-value pairs. :param stanza: A dictionary of key-value pairs for the stanza. :type stanza: ``dict`` :return: The :class:`Stanza` object. """

        body = _encode(**stanza)
        self.service.post(self.path, body=body)
        return self