Update app.py

app.py

@@ -36,8 +36,8 @@ def preprocess_input(row_values):
     input_df['byte_ratio'] = input_df['sbytes'] / (input_df['dbytes'] + 1)
     input_df['pkt_ratio'] = input_df['Spkts'] / (input_df['Dpkts'] + 1)
 
-    # Drop unused or label columns
-    input_df = input_df.drop(columns=features_to_drop + ['attack_cat', 'Label'], errors='ignore')
+    # ✅ Fix: convert features_to_drop to list before adding with another list
+    input_df = input_df.drop(columns=list(features_to_drop) + ['attack_cat', 'Label'], errors='ignore')
 
     return input_df