Update app.py

app.py

@@ -1,4 +1,4 @@
-import urllib.request
+import urllib.request 
 import fitz
 import re
 import numpy as np
@@ -274,7 +274,7 @@ with gr.Blocks(css="""#chatbot { font-size: 14px; min-height: 1200; }""") as dem
             chatbot = gr.Chatbot(placeholder="Chat History", label="Chat History", lines=50, elem_id="chatbot")
 
 
-
+#
     # Bind the click event of the button to the question_answer function
     btn.click(
         question_answer,