Update app.py

app.py

@@ -499,7 +499,7 @@ class EvaluationService:
         """
         try:
             # Prepare the new evaluation data
-            new_row = f'"{source_lang}","{target_lang}","{user_input.replace(\'"\', \'""\')}","{model_output.replace(\'"\', \'""\')}","{notation if notation else \'\'}","{correct_answer if correct_answer else \'\'}"\n'
+            new_row = f'"{source_lang}","{target_lang}","{user_input.replace("\"", "\"\"")}","{model_output.replace("\"", "\"\"")}","{notation or ""}","{correct_answer or ""}"\n'
             
             # Get existing content
             existing_content = EvaluationService.read_existing_csv_content()