update ui

app.py

@@ -102,7 +102,7 @@ def main_fn(
     n_neighbors=500,
     min_dist=0.1,
 ):
-    if len(images) == 0:
+    if len(images) is None:
         return [], example_items
     
     if perplexity >= num_sample_tsne or n_neighbors >= num_sample_tsne:
@@ -175,10 +175,10 @@ with gr.Blocks() as demo:
         return default_images, default_outputs, []
 
     def empty_input_and_output():
-        return [], []
+        return [], [], example_items
     
     load_images_button.click(load_default_images, outputs=[input_gallery, output_gallery, example_gallery])
-    clear_images_button.click(empty_input_and_output, outputs=[input_gallery, output_gallery])
+    clear_images_button.click(empty_input_and_output, outputs=[input_gallery, output_gallery, example_gallery])
     submit_button.click(
         main_fn,
         inputs=[