Update app.py

app.py

@@ -41,6 +41,9 @@ def get_arxiv_title_and_abstract(link):
 
 
 def classify_paper(title, abstract):
+    if title == '' and abstract == '':
+        raise gr.Error('Fill Title or/and Abstract')
+    
     text = f"TITLE\n{title}\n\nABSTRACT\n{abstract}"
     item = classifier.tokenizer(text)
     input_tensor = torch.tensor(item['input_ids'])[None]
@@ -71,6 +74,7 @@ with gr.Blocks(title='Paper classifier') as demo:
         with gr.Column():
             gr.Markdown('## Topics')
             gr.Markdown('## ')
+            gr.Markdown('## ')
             out = gr.Label(label="Topics")
             b2.click(classify_paper, inputs=[title, abstract], outputs=out)
     
@@ -83,4 +87,4 @@ with gr.Blocks(title='Paper classifier') as demo:
         cache_examples=True,
     )
 
-demo.launch()
+demo.launch(share=True)