Fix some problems

app.py

@@ -73,6 +73,10 @@ with gr.Blocks() as demo:
 
     file_widget = gr.File(label="Binary file")
 
+    with gr.Column(visible=False) as col:
+        #output = gr.Textbox("Output")
+        fun_dropdown = gr.Dropdown(label="Select a function", choices=["Woohoo!"], interactive=True)
+
     def file_change_fn(file):
 
         if file is None:
@@ -80,15 +84,14 @@ with gr.Blocks() as demo:
                     all_dis_state: None}
         else:
 
+            #fun_data = {'one': 2, 'two': 3}
             fun_data = get_all_dis(file.name)
 
             return {col: gr.update(visible=True),
-                    fun_dropdown: gr.update(choices=fun_data.keys()),
-                    all_dis_state: fun_data}
-    
-    with gr.Column(visible=False) as col:
-        #output = gr.Textbox("Output")
-        fun_dropdown = gr.Dropdown(label="Functions", choices=[""])
+                    fun_dropdown: gr.Dropdown.update(choices=list(fun_data.keys()), value=next(iter(fun_data.keys()))),
+                    all_dis_state: fun_data
+                    }
+
 
     file_widget.change(file_change_fn, file_widget, [col, fun_dropdown, all_dis_state])