gistfile1.html

<!-- ZPT: write clean inline JavaScript code -->
<!-- rstk.json_dumps translates the Python dict to a JS dict, used in JS code -->

<script>
function setup_my_html(config) {
    var e = document.getElementById(config.the_id);
    //....
}
</script>

<script tal:define="config python:here.rstk.json_dumps({'the_id': 'cucu'})"
        tal:content="string:setup_my_html(${config});" />