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app.py

@@ -30,7 +30,7 @@ def predict_sales():
         'Store_Size': data['Store_Size'],
         'Store_Location_City_Type': data['Store_Location_City_Type'],
         'Store_Type': data['Store_Type'],
-        'Product_Id_char': data['Product_Id_char'],
+        'Product_Id_char': data['Product_Id_char'].astype(str),
         'Store_Age_Years': data['Store_Age_Years'],
     }
     print(f'sample = {sample}')