added basic app file

app.py

@@ -0,0 +1,8 @@
+from platform import python_version
+import gradio as gr
+
+def greet(name):
+    return "Hello " + name + "!!" + "Using python version: " + python_version()
+
+iface = gr.Interface(fn=greet, inputs="text", outputs="text")
+iface.launch()