Update app.py

app.py

@@ -148,7 +148,7 @@ def predict_inverse(hardness_target, ys_target, request: gr.Request):
 
     continuous_variables = ['PROPERTY: Calculated Density (g/cm$^3$)',
                          'PROPERTY: Calculated Young modulus (GPa)']
-    categorical_variables = list(one_hot.columns)
+    categorical_variables = list(one_hot_columns)
     for c in continuous_variables:
         categorical_variables.remove(c)