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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 create(self, installed_add_on_sid):
 """ Create a new AssignedAddOnInstance :param unicode installed_add_on_sid: The SID that identifies the Add-on installation :returns: Newly created AssignedAddOnInstance :rtype: twilio.rest.api.v2010.account.incoming_phone_number.assigned_add_on.AssignedAddOnInstance """

        data = values.of({'InstalledAddOnSid': installed_add_on_sid, })

        payload = self._version.create(
            'POST',
            self._uri,
            data=data,
        )

        return AssignedAddOnInstance(
            self._version,
            payload,
            account_sid=self._solution['account_sid'],
            resource_sid=self._solution['resource_sid'],
        )