Using the jsontemplate engine (or, the beauty of python)

test_app.py

# via http://json-template.googlecode.com/svn/trunk/doc/Introducing-JSON-Template.html

import jsontemplate
import json

# load template
template = open('test_template.html', 'r').read()
# load data
data = json.loads(open('test_data.json', 'r').read())

# use jsontemplate
result = jsontemplate.expand(template, data)

# write file
url = 'out.html'
open(url, 'w').write(result)

# open in browser
import webbrowser
chrome_path = 'open -a /Applications/Google\ Chrome.app %s'
webbrowser.get(chrome_path).open(url)

test_data.json

{
  "url-base": "http://example.com/music/", 
  "playlist-name": "Epic Playlist", 
  "songs": [
    {
      "url": "1.mp3", 
      "artist": "Grayceon", 
      "title": "Sounds Like Thunder"
    }, 
    {
      "url": "2.mp3", 
      "artist": "Thou", 
      "title": "Their Hooves Carve Craters in the Earth"
    }
  ]
}

test_template.html

{# This is a comment and will be removed from the output.}

{.section songs}
  <h2>Songs in '{playlist-name}'</h2>

  <table width="100%">
  {.repeated section @}
    <tr>
      <td><a href="{url-base|htmltag}{url|htmltag}">Play</a>
      <td><i>{title}</i></td>
      <td>{artist}</td>
    </tr>
  {.end}
  </table>
{.or}
  <p><em>(No page content matches)</em></p>
{.end}