'Create `num_teams` teams belonging to `topic`.'

def create_teams(self, topic, num_teams, time_between_creation=0):

    teams = []
    for i in xrange(num_teams):
        team = {'course_id': self.course_id, 'topic_id': topic['id'], 'name': 'Team    {}'.format(i), 'description': 'Description    {}'.format(i), 'language': 'aa', 'country': 'AF'}
        teams.append(self.post_team_data(team))
        time.sleep(time_between_creation)
    return teams
