title: xgboost TypeError: can not initialize DMatrix from DataFrame
body: <p>I am getting the below error when creating a DMatrix from a data in python.</p>
  
  <blockquote>
    <p>TypeError: can not initialize DMatrix from DataFrame<br>
    Exception AttributeError: "'DMatrix' object has no attribute 'handle'" in  &lt;bound method DMatrix.&#95;&#95;del__ ofrix object at 0x584d210>> ignored</p>
  </blockquote>