Update app.py

app.py

@@ -464,8 +464,8 @@ def share(title, editor, cover_art):
     
   buffered = io.BytesIO()
   cover_art = Image.fromarray(cover_art.astype('uint8'))    
-  cover_art.save(buffered, format="PNG")
-  img_str = base64.b64encode(buffered.read())
+  cover_art.save(buffered, format="JPEG")
+  img_str = base64.b64encode(buffered.getvalue())
 
   dataset['train'] = dataset['train'].add_item({
       'title': title,
@@ -475,9 +475,7 @@ def share(title, editor, cover_art):
 
   dataset.push_to_hub("chansung/llama2-stories", token=TOKEN)
     
-  return  [
-      "       "
-  ]
+  return  "       "
 
 with gr.Blocks(css=STYLES) as demo: