title: AttributeError: 'DatasetAutoFolds' object has no attribute 'split'
body: <p><a href="https://i.stack.imgur.com/I8kB5.png" rel="noreferrer"><img src="https://i.stack.imgur.com/I8kB5.png" alt="enter image description here"></a></p>
  
  <p>the code s from a recommendation engine using surprise module, i can't find the answer anywhere.</p>