Django tag to publish some settings value in template

gistfile1.py

# based upon ideas in http://stackoverflow.com/a/6343321
@register.simple_tag(takes_context=True)
def settings_value(context, name):
    PUBLIC_SETTINGS_NAMES = ("THEME_DEBUG",)
    if name in PUBLIC_SETTINGS_NAMES:
        context[name] = getattr(settings, name, "")
        return ''
    return ''

With PUBLIC_SETTINGS_NAMES in settings:

@register.simple_tag(takes_context=True)
def settings_value(context, name):
    PUBLIC_SETTINGS_NAMES = settings.PUBLIC_SETTINGS_NAMES
    if name in PUBLIC_SETTINGS_NAMES:
        context[name] = getattr(settings, name, "")
        return ''
    return ''