doctype html
html lang='en'
  head
    meta charset='utf-8'
    meta name='viewport' content='width=device-width, initial-scale=1, shrink-to-fit=no'
    meta http-equiv='x-ua-compatible' content='ie=edge'
    title
      -block name='title'
    -block name='extrahead'

  body onload='brython()'
    = next.body()

    script src='https://cdn.rawgit.com/brython-dev/brython/3.2.6/www/src/brython.js'
    script type='text/python' src='client.py'
    -block name='extrascript'