Update app.py

app.py

@@ -3,10 +3,10 @@ import gradio as gr
 def greet(name):
     return "Hello, " + name + "!"
 
-demo = gr.Interface(
+iface = gr.Interface(
     fn=greet,
     inputs=["text"],
     outputs=["text"],
 )
 
-demo.launch()
+iface.launch()