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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 getEndpoint(self):
 """ Retrieve the NS1 API Endpoint URL that will be used for requests. :return: URL of the NS1 API that will be used for requests """

        port = ''
        endpoint = ''
        keyConfig = self.getKeyConfig()
        if 'port' in keyConfig:
            port = ':' + keyConfig['port']
        elif self._data['port'] != self.PORT:
            port = ':' + self._data['port']
        if 'endpoint' in keyConfig:
            endpoint = keyConfig['endpoint']
        else:
            endpoint = self._data['endpoint']
        return 'https://%s%s/%s/' % (endpoint,
                                     port,
                                     self._data['api_version'])