title: Install npm packages in Python virtualenv
body: <p>There are some npm packages which I would like to install in a Python virtualenv. For example: </p>
  
  <ul>
  <li><a href="https://www.npmjs.com/package/pdfjs-dist" rel="noreferrer">https://www.npmjs.com/package/pdfjs-dist</a></li>
  <li><a href="https://www.npmjs.com/package/jquery-ui" rel="noreferrer">https://www.npmjs.com/package/jquery-ui</a></li>
  </ul>
  
  <p>Up to now I only found the complicated way to get these installable in a virtualenv: Create a python package for them.</p>
  
  <p>Is there no simpler way to get npm packages installed in a Python virtualenv?</p>