Update app.py

app.py

@@ -8,6 +8,8 @@ from llama_index.llms.palm import PaLM
 from llama_index import ServiceContext, VectorStoreIndex, Document
 from llama_index.memory import ChatMemoryBuffer
 import os
+import base64
+
 
 # Function to get image caption via Kosmos2 (as in your original code)
 import numpy as np