Update utils.py

utils.py

@@ -56,7 +56,7 @@ def load_and_preprocess_data():
 
     # Add the categorical index to the starting dataframe
     #df["CustomerIndex"] = user_idx
-    df["ProductIndex"] = product_idx
+    merged_df["ProductIndex"] = product_idx
     # Merging both DataFrames based on respective common columns
     merged_df = pd.merge(df, df_users[['User-ID', 'Location', 'Age']], on='User-ID', how='left')
     merged_df = pd.merge(merged_df, df_books[['ISBN', 'Book-Title', 'Book-Author', 'Year-Of-Publication']], on='ISBN', how='left')