Update app.py

app.py

@@ -448,12 +448,12 @@ def server(input, output, session):
                 }))
         
         brushed_df_final.with_columns(
-            pl.when(pl.col("Spin").is_not_null())
+            pl.when(pl.col("Spin").fill_nan(None).is_not_null())
               .then(pl.col("Spin").cast(pl.Float64).round(0))
               .otherwise(0)
               .alias("Spin")
         )
-        
+                
         # brushed_df_final = brushed_df_final
         
         # print(brushed_df_final)