models:
    class R(models.Model):
        Dls = ((u'cvety',u'Цветы'),(u'podarki',u'Подарки'),)
        dl = models.CharField(u'Вид', choices= Dls, default=u'cvety', max_length=32)
       ...
views:
    def rs(request, dl):
        return render_to_response('rs/rs.html',
            {
            'rs': rs = R.objects.filter(dl=dl),
            'dl': dl,
            }, context_instance = RequestContext(request) )

    def rs(request, dl):
        print dl
        return render_to_response('rs/rs.html',
            {
            'rs': rs = R.objects.filter(dl=dl),
            'dl': dl,
            }, context_instance = RequestContext(request) )

django.core.exceptions.ImproperlyConfigured: Requested setting DATABASES, but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings.

url(r'^(\w+)/$', ‘rs’, name = ‘rs’),

url(r'([A-Za-z])/$', 'rs', name = 'rs'),