title: NameError: name 'request' is not defined in python 3
body: <p>I am trying to run the basic feature extraction code from the following site:<br>
  <a href="http://musicinformationretrieval.com/" rel="nofollow noreferrer">musicinformationretrieval</a>.<br>
  When I try to run the following code line: </p>
  
  <pre><code>kick_filepaths, snare_filepaths = stanford_mir.download_samples(collection="drum_samples_train")
  </code></pre>
  
  <p>it shows the following error message:</p>
  
  <pre><code>---------------------------------------------------------------------------
  AttributeError                            Traceback (most recent call last)
  &lt;ipython-input-3-7c764e7836ee&gt; in &lt;module&gt;()
  ----&gt; 1 kick_filepaths, snare_filepaths = stanford_mir.download_samples(collection="drum_samples_train")
  
  C:\Users\dell\Desktop\stanford-mir-gh-pages\stanford_mir.py in download_samples(collection, download)
       89                 for i in range(1, 11):
       90                     filename = '%s_%02d.wav' % (drum_type, i)
  ---&gt; 91                     urllib.urlretrieve('http://audio.musicinformationretrieval.com/drum_samples/%s' % filename,
       92                                        filename=os.path.join(collection, filename))
       93         kick_filepaths = [os.path.join(collection, 'kick_%02d.wav' % i) for i in range(1, 11)]
  
  AttributeError: module 'urllib' has no attribute 'urlretrieve'
  </code></pre>
  
  <p>Please help me to solve this issue.</p>