fix

app.py

@@ -1,7 +1,8 @@
 import gradio as gr
 
 def greet(name):
-    return "Hello " + name + "!!"
-
     iface = gr.Interface(fn=greet, inputs="text", outputs="text")
     iface.launch()
+
+if __name__ == '__main__':
+    greet('Hello World.')