Create new file

app.py

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+import gradio as gr
+
+def update(name):
+    return f"Welcome to Gradio, {name}!"
+
+demo = gr.Blocks()
+
+with demo:
+    gr.Markdown(
+    """
+    # Hello World!
+    Start typing below to see the output.
+    """)
+    inp = gr.Textbox(placeholder="What is your name?")
+    out = gr.Textbox()
+
+    inp.change(fn=update, 
+               inputs=inp, 
+               outputs=out)
+
+demo.launch()