Update app.py

app.py

@@ -14,7 +14,7 @@ def predict_price_tool(arg1:str)-> float: #it's import to specify the return typ
     Args:
         arg1: the category of product
     """
-    filter_dataset = dataset['train']['Category'].unique()
+    filter_dataset = set(dataset['train']['Category'])
     #filter_dataset_min = filter_dataset['Selling Price'].min()
     #filter_dataset_max = filter_dataset['Selling Price'].min()
     return 1