def players_in_tournament(t_body):
    """Get number of players in a tournament
    
    Args:
        t_body (element.tag) : tourn table body. Child of ResponsiveTable
    
    Returns:
        number of players
    """
    players = t_body.find_all("tr", class_="Table__TR Table__even")
    if players is not None:
        num_players = len(players)
        return num_players