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app.py

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+# URL: https://huggingface.co/spaces/gradio/hello_world
+# imports
+import gradio as gr
+
+# core function
+def greet(name):
+    return "Hello " + name + "!"
+
+# text to text interface 
+demo = gr.Interface(fn=greet, inputs="text", outputs="text")
+    
+# launch 
+demo.launch()