title: sklearn scaler train with feature names but use on no names feature, this is ok?
body: <p>I use sklearn scaller (power transform and more) who were train on feature with names column in a data frame.
  I reuse this scaller on a new data set, with same order columns but no names.
  It is ok? I imagine yes if the order stay the same...</p>
  <p>since I've got this warnning...</p>
  <pre><code>UserWarning: X does not have valid feature names, but PowerTransformer 
  was fitted with feature names
    &quot;X does not have valid feature names, but&quot;
  </code></pre>