Update app.py

app.py

@@ -88,9 +88,11 @@ def main():
   
   try:
     uploaded_file = st.sidebar.file_uploader("Choose a file", type = "pdf")
-    st.stop()
+    #st.stop()
   except:
+    #if uploaded_file 
     st.write("Upload a pdf file...")
+    st.stop()
   
   if uploaded_file is not None:
     reader = PdfReader(uploaded_file)