title: How to update pip on EMR notebook
body: <p>Am trying to update pip on EMR notebook, <code>sc.install_pypi_package</code> seems to install an older version, I also tried</p>
  <pre><code>import os
  cmd = 'pip install --upgrade pip'
  print(os.system(cmd))
  </code></pre>
  <p>but doesn't seem to work</p>