switched to spinner

app.py

@@ -191,9 +191,10 @@ def answer_callback(question_query):
     global docs
     # global pdf_info
     progress_text = "Please wait..."
-    my_bar = st.progress(0, text = progress_text)
+    # my_bar = st.progress(0, text = progress_text)
+    st.spinner(text="Please wait...")
     if docs is None:
-        my_bar.progress(0.2, "Please wait...")
+        # my_bar.progress(0.2, "Please wait...")
         pdf_info = st.session_state['pdf_info']
         print('buliding docs')
         docs = paperqa.Docs()
@@ -207,7 +208,8 @@ def answer_callback(question_query):
     # docs._build_faiss_index()
     answer = docs.query(question_query)
     # print(answer.formatted_answer)
-    my_bar.progress(1.0, "Done!")
+    # my_bar.progress(1.0, "Done!")
+    st.success('Done!')
     return answer.formatted_answer