def create_profile(sender, **kw):
if 'instance' not in kw or not kw.get('created', False):
return
instance = kw['instance']
profile = UserProfile()
profile.user = instance
bc, im = create_barcode(u'USER-{0}'.format(instance.username[0]),
instance.id, instance.username)
profile.barcode = bc
content = ContentFile(im)
profile._barcode.save('{0}.png'.format(bc), content)
profile.save()
