Create app.py

app.py

@@ -0,0 +1,13 @@
+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()
+    radio_button.change(fn=change_textbox, inputs=radio_button, outputs=text_box)
+ 
+demo.queue().launch()