Update app.py

app.py

@@ -48,11 +48,12 @@ def extract_metadata(file):
     parser = ParserManager()
     info = parser.parse(file.name)
     prompt = info.prompts[0].value if info.prompts else ''
+    # info.models may be a set or list of model identifiers
+    model_name = ''
     if hasattr(info, 'models') and info.models:
-        first = info.models[0]
+        # pick one representative model
+        first = next(iter(info.models))
         model_name = first.name if hasattr(first, 'name') else str(first)
-    else:
-        model_name = ''
     return prompt, model_name
 
 # Image preprocessing transform