'Render only selected tags.'

def render_options(self, *args):

    selected_choices_arg = (1 if (VERSION < (1, 10)) else 0)
    selected_choices = args[selected_choices_arg]
    if selected_choices:
        selected_choices = selected_choices.split(',')
    options = [('<option    value="%s"    selected="selected">%s</option>' % (c, c)) for c in selected_choices]
    return '\n'.join(options)
