bug fixes

app.py

@@ -5,7 +5,7 @@ class_names = ['cat', 'dog']
 
 def update_dropdown(className):
     class_names.append(className)
-    return gr.Dropdown.update(choices=class_names)
+    return gr.Dropdown(choices=class_names)
 
 def show_picked_class(className):
     return className
@@ -25,7 +25,7 @@ def image_classifier(inp):
 
     labeled_result = {name:score for name, score in zip(class_names, normalized_percentages)}
 
-    return labeled_result, gr.Dropdown.update(choices=class_names)
+    return labeled_result, gr.Dropdown(choices=class_names)
 
 demo = gr.Blocks()