change output type

app.py

@@ -256,11 +256,11 @@ def update_display(image):
     top_k = 50
     # gr.Slider(10,200,value=50,label="Number of Closest Samples for Distribution Chart",interactive=True,info="Choose between 10 and 200")
     class_predicted = "Class Predicted" # gr.Label(label='Class Predicted',num_top_classes=10)
-    exp_gallery = []
+    exp_gallery = None
     # gr.Gallery(label="Explanation Heatmaps for top 5 predicted classes", show_label=False,elem_id="gallery",columns=[5], rows=[1],height='auto', allow_preview=True, preview=None)
-    closest_gallery = []
+    closest_gallery = None
     # gr.Gallery(label="Closest Images", show_label=False,elem_id="gallery",columns=[5], rows=[1],height='auto', allow_preview=True, preview=None)
-    diagram= ""
+    diagram= None
     # gr.Image(label = 'Bar Chart')
     return processed_image,processed_image,instruction,model_name,explain_method,sampling_size,top_k,exp_gallery,closest_gallery,diagram
 def update_slider_visibility(explain_method):