def get_group_winners(self, group):
        """
        :param group: ``str`` the group letter to get winners of
        :return: ``tuple`` of winner and runner-up for the given group

        group stage works a bit different from all other stages, so this method gets the probable winners of the given
        ``group``
        """
        group_teams = Team.get_for_group(self.teams, group)
        probs_to_advance = []

        for team in group_teams:
            prob_to_advance = team.probability_to_advance_from_group()
            probs_to_advance.append((team, prob_to_advance))

        winners = [team for team, prob_to_advance in sorted(probs_to_advance, key=lambda x: x[1], reverse=True)][:2]
        return winners[0], winners[1]
 def test_get_for_group(self):
     self.assertIn(Team.get_for_country(self.teams, 'Brazil'), Team.get_for_group(self.teams, 'A'))
     self.assertNotIn(Team.get_for_country(self.teams, 'Brazil'), Team.get_for_group(self.teams, 'B'))