Update app.py

app.py

@@ -8,6 +8,11 @@ from langchain.text_splitter import CharacterTextSplitter
 from langchain.embeddings import OpenAIEmbeddings
 from langchain.vectorstores import Chroma
 
+from gpt_index import SimpleDirectoryReader, GPTListIndex, GPTSimpleVectorIndex, LLMPredictor, PromptHelper, ServiceContext
+#from langchain import OpenAI
+#import gradio as gr
+import sys
+
 
 # Set the path of your new directory
 dir_path = "./docs"