Update app.py

app.py

@@ -117,7 +117,7 @@ class Chatbot():
         embedding_model = "text-embedding-ada-002"
         # Get the embeddings for each text element in the dataframe
         embeddings = df.text.apply(lambda x: get_embedding(x, engine=embedding_model))
-        embeddings = np.array(embeddings, dtype=np.float32)
+        embeddings = np.vstack(embeddings, dtype=np.float32)
         return embeddings    
 
     def search_embeddings(self, embeddings, df, query, n=3, pprint=True):