How to use the azure-cognitiveservices-vision-computervision.azure.cognitiveservices.vision.computervision.models.__dict__ function in azure-cognitiveservices-vision-computervision

def __init__(
            self, endpoint, credentials):

        self.config = ComputerVisionClientConfiguration(endpoint, credentials)
        super(ComputerVisionClient, self).__init__(self.config.credentials, self.config)

        client_models = {k: v for k, v in models.__dict__.items() if isinstance(v, type)}
        self.api_version = '2.0'
        self._serialize = Serializer(client_models)
        self._deserialize = Deserializer(client_models)