def mk_msg_cost(self, account=None, tag_pool=None, **kw):
if account is None:
account = Account.objects.get(
user=self.user_helper.get_django_user())
if tag_pool is None:
tag_pool = TagPool(name=u"pool", description=u"description")
tag_pool.save()
return MessageCost(account=account, tag_pool=tag_pool, **kw)
