title: Python 3 support in Google's CoLab
body: <p>I have been experimenting with the Jupyter notebooks at <a href="https://colab.research.google.com" rel="noreferrer">https://colab.research.google.com</a>, and it seems that by default they run Python 2.7.</p>
  
  <p>Is there any way to enable Python 3 support on CoLab?</p>