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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(self, sid):
 """ Constructs a FactorContext :param sid: A string that uniquely identifies this Factor. :returns: twilio.rest.authy.v1.service.entity.factor.FactorContext :rtype: twilio.rest.authy.v1.service.entity.factor.FactorContext """

        return FactorContext(
            self._version,
            service_sid=self._solution['service_sid'],
            identity=self._solution['identity'],
            sid=sid,
        )