Update appChatbot.py

appChatbot.py

@@ -1,8 +1,15 @@
 import os
+import json
 
 import gradio as gr
 from huggingface_hub import InferenceClient
 
+from langchain.text_splitter import CharacterTextSplitter
+from langchain.embeddings import OpenAIEmbeddings
+from langchain.vectorstores import Chroma
+from langchain.document_loaders import PyPDFLoader
+from fastapi.encoders import jsonable_encoder
+
 """
 For more information on `huggingface_hub` Inference API support, please check the docs: https://huggingface.co/docs/huggingface_hub/v0.22.2/en/guides/inference
 """