Update app.py

app.py

@@ -11,4 +11,6 @@ with gr.Blocks(title="Copier") as demo:
         with gr.Column():
             tgt_sentence = gr.Textbox(label="Copy", placeholder="Copy will show here...")
     btn = gr.Button("Copy!")
-    btn.click(fn=copy, inputs=[src_sentence], outputs=[tgt_sentence])
+    btn.click(fn=copy, inputs=[src_sentence], outputs=[tgt_sentence])
+
+demo.launch()