Update app.py

app.py

@@ -61,7 +61,7 @@ with tab1:
               st.cache_data.clear()
               prop_display, timestamp = pull_baselines()
     prop_frame = prop_display
-    prop_frame.replace("", nan_value, inplace=True)
+    prop_frame.replace("", np.nan, inplace=True)
     st.dataframe(prop_frame.style.background_gradient(axis=0).background_gradient(cmap='RdYlGn').format(precision=2), use_container_width = True)
     
     st.download_button(