title: from data import DataSet
body: <p>I'm trying to replicate some Python code on a Github website. I'm running <code>Python3.6.8</code> in a conda environment.  </p>
  
  <pre><code>import numpy as np
  import os.path
  from data import DataSet
  </code></pre>
  
  <p>I get the Error: </p>
  
  <pre class="lang-sh prettyprint-override"><code>Traceback (most recent call last):
    File "extract_features.py", line 16, in &lt;module&gt;
      from data import DataSet
  ImportError: cannot import name 'DataSet'
  </code></pre>
  
  <p>I am not sure which module is causing this error. <code>python -c "import data"</code> gives no error. </p>