Update app.py

app.py

@@ -20,7 +20,7 @@ def preprocess_text(element):
         # text = text.lower()
         return text
     else:
-        return "
+        return ""
 
 def get_openai_response(text, length=100, model="gpt-3.5-turbo-instruct"):
     summarizer = pipeline("summarization", model=model)