Return the game file for a certain day matching certain criteria.

def get_scoreboard(year, month, day):
    """Return the game file for a certain day matching certain criteria."""
    try:
        data = urlopen(BASE_URL.format(year, month, day) + 'scoreboard.xml')
    except HTTPError:
        data = os.path.join(PWD, 'default.xml')
    return data