How to use the azure-cognitiveservices-language-textanalytics.azure.cognitiveservices.language.textanalytics.models.__dict__ function in azure-cognitiveservices-language-textanalytics

def __init__(
            self, azure_region, credentials):

        self.config = TextAnalyticsAPIConfiguration(azure_region, credentials)
        self._client = ServiceClient(self.config.credentials, self.config)

        client_models = {k: v for k, v in models.__dict__.items() if isinstance(v, type)}
        self.api_version = 'v2.0'
        self._serialize = Serializer(client_models)
        self._deserialize = Deserializer(client_models)