domtest.txt

<script type="text/python">
def dom_from_python(s):
   document.getElementById('name').innerHTML = s

def foo():
    return u'tav'
</script>


<div>
  Hello
  <div id="name">
  </div>
</div>

<div>
<a href="#" onclick="dom_from_python(foo())">Blah</a>
</div>

<script>
dom_from_python("world")
</script>