分数判定—井字棋

• 使用设置记录下输赢情况。赢表示1，输表示-1，平表示0
• 在创建节点功能中，节点数据新增一个分数键值对，默认值为None
• 创建get_state功能进行判断谁是赢者

# 获取棋盘状态
def get_state(board):
    # 行相同
    for i in range(3):
        if board[i][0] == board[i][1] == board[i][2] and board[i][0] != EMPTY:
            # 返回赢家
            return board[i][0]
    # 列相同
    for j in range(3):
        if board[0][j] == board[1][j] == board[2][j] and board[0][j] != EMPTY:
            # 返回赢家
            return board[0][j]
    # 对角线相同
    if board[0][0] == board[1][1] == board[2][2] and board[1][1] != EMPTY:
        # 返回赢家
        return board[0][0]
    if board[0][2] == board[1][1] == board[2][0] and board[1][1] != EMPTY:
        # 返回赢家
        return board[0][2]
    # 平局，返回'Draw'
    if len(empty_pos(board)) == 0:
        return 'Draw'
    # 继续，返回'Continue'
    return 'Continue'

• 'x'表示✖赢
• 'o'表示●赢
• 'Draw'表示平局
• 'Continue'表示继续下棋
• 获取棋盘状态

state = get_state(node['board'])

• 计算并设置叶子节点分数

if is_over(['board']) == True:
    if state == 'Draw':
        node['score'] = 0
    elif state == X_CHESS:
        node['score'] = 1
    else:
        node['score'] = -1

• 使用current_chess功能获取当前落子情况，并赋值给全局变量ai_chess

if state != 'Continue':
    if state == 'Draw':
        node['score'] = 0
    elif state == ai_chess:
        node['score'] = 1
    else:
        node['score'] = -1