Update app.py

app.py

@@ -516,9 +516,19 @@ def server(input, output, session):
             ("rhh_percent", "rhh_percent_old"),
             ("lhh_percent", "lhh_percent_old"),
         ]
-
+        
+        
+        df_merge = df_merge.with_columns([
+            # Step 1: Create _diff columns with the default value (e.g., 80) if old is null
+            pl.when(pl.col(old).is_null())
+            .then(pl.lit(10000))  # If old is null, assign 80 as the default
+            .otherwise(pl.col(new) - pl.col(old))  # Otherwise subtract old from new
+            .alias(new + "_diff")
+            for new, old in cols_to_subtract_percent
+        ])
+        
         # percent_cols = ['pitch_percent', 'rhh_percent', 'lhh_percent']
-
+        
         # Step 2: Format the columns with (value (+diff)) - exclude brackets if diff is 80
         df_merge = df_merge.with_columns([
             pl.when(pl.col(new + "_diff").eq(10000))  # If diff is 80, no need to include brackets
@@ -527,7 +537,7 @@ def server(input, output, session):
                 (pl.col(new)*100).round(1).map_elements(lambda x: f"{x:.1f}%").cast(pl.Utf8) + 
                 "\n(" + 
                 (pl.col(new + "_diff")*100).round(1)
-                    .map_elements(lambda x: f"{x:+.1f}") + 
+                    .map_elements(lambda x: f"{x:+.1f}%") + 
                 ")"
             ).alias(new + "_formatted")
             for new, _ in cols_to_subtract_percent
@@ -536,7 +546,6 @@ def server(input, output, session):
 
 
 
-
         # df_merge = df_merge.with_columns([
         #     (pl.col(col) * 100)  # Convert to percentage
         #     .round(1)            # Round to 1 decimal