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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 createService(self, service):
 """ Creates a new GIS service in the folder. A service is created by submitting a JSON representation of the service to this operation. """

        url = self._url + "/createService"
        params = {
            "f" : "json"
        }
        if isinstance(service, str):
            params['service'] = service
        elif isinstance(service, dict):
            params['service'] = json.dumps(service)
        return self._post(url=url,
                             param_dict=params,
                             securityHandler=self._securityHandler,
                             proxy_url=self._proxy_url,
                             proxy_port=self._proxy_port)