human
I wrote the below code

    def get_key(flavor, sort_key):
        try:
            return getattr(flavor, sort_key)
        except AttributeError:
            LOG.warning('Could    not    find    sort    key    "%s".    Using    the    default    "ram"    instead.', sort_key)
            return getattr(flavor, 'ram')
    try:
        flavor_sort = getattr(settings, 'CREATE_INSTANCE_FLAVOR_SORT', {})
        sort_key = flavor_sort.get('key', 'ram')
        rev = flavor_sort.get('reverse', False)
        if (not callable(sort_key)):
            key = (lambda flavor: get_key(flavor, sort_key))
        else:
            key = sort_key
        flavor_list = [(flavor.id, ('%s' % flavor.name)) for flavor in sorted(flavors, key=key, reverse=rev)]
        return flavor_list
    except Exception:
        exceptions.handle(request, _('Unable    to    sort    instance    flavors.'))
        return []

What's a good function header?
 Can you provide a Python program to find    sort    key    "%s"?
assistant
#Here is Python program to find    sort    key    "%s".

def sort_flavor_list(request, flavors):