def _is_zeroshot(self):
        """Check whether zero-shot topic modeling is possible.

        * Embedding model is necessary to convert zero-shot topics to embeddings
        * Zero-shot topics should be defined
        """
        if self.zeroshot_topic_list is not None and self.embedding_model is not None:
            return True
        return False
Check whether zero-shot topic modeling is possible.

        * Embedding model is necessary to convert zero-shot topics to embeddings
        * Zero-shot topics should be defined
        
bertopic/_bertopic.py