Update app.py

app.py

@@ -6,7 +6,7 @@ from PyPDF2 import PdfReader
 from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain.callbacks.manager import CallbackManager
 from langchain.callbacks.streaming_stdout import StreamingStdOutCallbackHandler
-
+from transformers import AutoTokenizer
 from langchain.vectorstores import Qdrant
 from qdrant_client.http import models
 from ctransformers import AutoModelForCausalLM