Update app.py

app.py

@@ -53,8 +53,8 @@ def dropdown_example(choice, img):
     return predict_top_classes(img, model_name)
 
 dropdown = gr.inputs.Dropdown(
-    choices=list(models.keys()),
-    type="str",
+    choices=list(["Xception","InceptionV3","InceptionResNetV2","DenseNet201"]),
+    type="index",
     label="Select a model"
 )