Create app.py

app.py

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+ActivePython 2.7.18.4 (ActiveState Software Inc.) based on
+Python 2.7.18.4 (default, Aug  9 2021, 23:37:24) [MSC v.1500 32 bit (Intel)] on win32
+Type "help", "copyright", "credits" or "license()" for more information.
+>>> import gradio as gr
+
+def greet(name):
+    return "Hello " + name + "!!"
+
+iface = gr.Interface(fn=greet, inputs="text", outputs="text")
+iface.launch()