Update app.py

app.py

@@ -25,6 +25,8 @@ from llama_index.core.memory import ChatMemoryBuffer
 import gradio as gr
 from io import StringIO
 
+import util as cu
+
 def get_credit_dist(history):
     atoms_l = cu.sentence_splitter.split_text(history[-1][1])
     atoms_l = list(filter(lambda x: len(x) > 50, atoms_l))