Update app.py

app.py

@@ -1,10 +1,11 @@
 import gradio as gr
+
 def change_textbox(choice):
     if choice in {"A", "B"}:
         return gr.update(interactive=False, value="not interactive")
     elif choice == "C":
         return gr.update(interactive=True)
-  
+
 with gr.Blocks() as demo:
     radio_button = gr.Radio(["A", "B", "C"], type="value")
     text_box = gr.Textbox()