How to use the azure-cognitiveservices-vision-customvision.azure.cognitiveservices.vision.customvision.prediction.version.VERSION function in azure-cognitiveservices-vision-customvision

def __init__(
            self, api_key, endpoint):

        if api_key is None:
            raise ValueError("Parameter 'api_key' must not be None.")
        if endpoint is None:
            raise ValueError("Parameter 'endpoint' must not be None.")
        base_url = '{Endpoint}/customvision/v3.0/prediction'

        super(CustomVisionPredictionClientConfiguration, self).__init__(base_url)

        self.add_user_agent('azure-cognitiveservices-vision-customvision/{}'.format(VERSION))

        self.api_key = api_key
        self.endpoint = endpoint