Update app.py

app.py

@@ -22,7 +22,7 @@ def extract_main_topic(arg1: str) -> str:
     # Initialize BERTopic model
     topic_model = BERTopic.load("MaartenGr/BERTopic_ArXiv")
 
-    topics, probs = topic_model.transform([text])
+    topics, probs = topic_model.transform([arg1])
 
     if topic_id == -1:  # BERTopic assigns -1 to noise (no topic detected)
         return "No clear topic detected."