title: name 'ImageDataBunch' is not defined
body: <p>I'm getting this error "name 'ImageDataBunch' is not defined" and am not able to find a solution on the Internet. </p>
  
  <p>The full code can be found here: <a href="https://dzlab.github.io/jekyll/update/2018/11/13/audio-classification/" rel="nofollow noreferrer">https://dzlab.github.io/jekyll/update/2018/11/13/audio-classification/</a>.</p>
  
  <pre><code>np.random.seed(42)
  data = ImageDataBunch.from_lists(path, fnames, labels, ds_tfms=None, size=224, bs=bs)
  data.normalize(imagenet_stats)
  data.show_batch(rows=5, figsize=(8,8))
  </code></pre>
  
  <p>I'm running this code on Google Colab and Python 3.6.</p>