Upload streamapp.py

streamapp.py

@@ -271,8 +271,10 @@ with tab3:
   
   with st.form(" trace"):
       
-    df = px.active_session().get_spans_dataframe().fillna('')
-    st.dataframe(df)
+    df0 = px.active_session().get_spans_dataframe()
+    if not df0.empty:
+       df= df0.fillna('')
+       st.dataframe(df)