Update app.py

app.py

@@ -191,7 +191,7 @@ def main():
 
     # Load Dataset
 train_dataset = load_dataset(data_source, tokenizer, uploaded_file=uploaded_file)
-    def load_dataset(data_source="demo", tokenizer=None, uploaded_file=None):
+def load_dataset(data_source="demo", tokenizer=None, uploaded_file=None):
     if data_source == "demo":
         data = ["Sample text data for model training. This can be replaced with actual data for better performance."]
     elif uploaded_file is not None: