title: How to edit Google Colaboratory libraries?
body: <p>I edited Keras <code>.optimizer</code> and <code>.layers</code> modules locally, but Colab uses its own Keras &amp; TensorFlow libraries. Uploading then using the edited libs would be rather involved per pathing and package interactions, and an overkill for a few small edits. </p>
  
  <p>The closest I've got to accessing a module is <code>keras.optimizers.__file__</code>, which gives a relative path I don't know what to do with: <em>'/usr/local/lib/python3.6/dist-packages/keras/optimizers.py'</em></p>
  
  <p>Can Colab libraries be edited? Permanently (not per-runtime)?</p>