title: cannot import name 'mean_absolute_percentage_error' from 'sklearn.metrics'
body: <p>I receive an error message:</p>
  <blockquote>
  <p>cannot import name 'mean_absolute_percentage_error' from 'sklearn.metrics'</p>
  </blockquote>
  <p>, when I run the following package:</p>
  <pre><code>from sklearn.metrics import mean_absolute_percentage_error
  </code></pre>
  <p>I appreciate any comments to fix it. Thank you.</p>