Bugfix

app.py

@@ -22,6 +22,7 @@ def apply_chat_template(template):
         without_gen = tokenizer.apply_chat_template(conversation, tokenize=False)
         with_gen = tokenizer.apply_chat_template(conversation, tokenize=False, add_generation_prompt=True)
         out += f"Conversation {i} without generation prompt:\n\n{without_gen}\n\nConversation {i} with generation prompt:\n\n{with_gen}\n\n"
+    return out
 
 iface = gr.Interface(fn=apply_chat_template, inputs="text", outputs="text")
 iface.launch()