{% raw %}
    <ul>
    {% for item in seq %}
        <li>{{ item }}</li>
    {% endfor %}
    </ul>
{% endraw %}

So, in case you want to use a script tag for your ractive template:

<script type="text/ractive">
 <ul>
 {{#users}}
    <li>{{name}}</li>
 {{/users}}
 </ul>
</script>

http://stackoverflow.com/questions/5117204/avoiding-ambiguous-mustaches-from-jinja2-that-includes-jquery-templates/5137124#5137124

You can always just keep your ractive templates in an external file and ajax load them.