用Python的tkinter库帮我写一个五子棋游戏

好的，下面是代码，注释中有详细解释：

import tkinter as tk

# 创建窗口
root = tk.Tk()
root.title("五子棋")

# 格子数
GRID_SIZE = 15
# 棋盘宽度和高度
BOARD_WIDTH = 500
BOARD_HEIGHT = 500
# 单元格大小
CELL_SIZE = BOARD_WIDTH // GRID_SIZE
# 棋子半径
PIECE_RADIUS = CELL_SIZE // 2 - 2

# 棋盘数组，0表示空，1表示黑子，2表示白子
board = [[0] * GRID_SIZE for _ in range(GRID_SIZE)]
# 当前是黑子还是白子
current_player = 1
# 是否结束游戏
game_over = False


def draw_board(canvas):
    """
    画棋盘
    """
    for i in range(GRID_SIZE):
        # 画横线
        canvas.create_line(CELL_SIZE // 2, CELL_SIZE // 2 + i * CELL_SIZE,
                           BOARD_WIDTH - CELL_SIZE // 2, CELL_SIZE // 2 + i * CELL_SIZE)
        # 画竖线
        canvas.create_line(CELL_SIZE // 2 + i * CELL_SIZE, CELL_SIZE // 2,
                           CELL_SIZE // 2 + i * CELL_SIZE, BOARD_HEIGHT - CELL_SIZE // 2)


def draw_piece(canvas, row, col, player):
    """
    画棋子
    """
    x = col * CELL_SIZE + CELL_SIZE // 2
    y = row * CELL_SIZE + CELL_SIZE // 2
    if player == 1:
        canvas.create_oval(x - PIECE_RADIUS, y - PIECE_RADIUS, x + PIECE_RADIUS, y + PIECE_RADIUS, fill="black")
    else:
        canvas.create_oval(x - PIECE_RADIUS, y - PIECE_RADIUS, x + PIECE_RADIUS, y + PIECE_RADIUS, fill="white")


def check_win(player):
    """
    检查是否获胜
    """
    for i in range(GRID_SIZE):
        for j in range(GRID_SIZE):
            # 横向检查
            if j + 4 < GRID_SIZE and board[i][j] == player and board[i][j + 1] == player and board[i][j + 2] == player \
                    and board[i][j + 3] == player and board[i][j + 4] == player:
                return True
            # 竖向检查
            if i + 4 < GRID_SIZE and board[i][j] == player and board[i + 1][j] == player and board[i + 2][j] == player \
                    and board[i + 3][j] == player and board[i + 4][j] == player:
                return True
            # 斜向检查
            if i + 4 < GRID_SIZE and j + 4 < GRID_SIZE and board[i][j] == player and board[i + 1][j + 1] == player \
                    and board[i + 2][j + 2] == player and board[i + 3][j + 3] == player and board[i + 4][j + 4] == player:
                return True
            if i + 4 < GRID_SIZE and j - 4 >= 0 and board[i][j] == player and board[i + 1][j - 1] == player \
                    and board[i + 2][j - 2] == player and board[i + 3][j - 3] == player and board[i + 4][j - 4] == player:
                return True
    return False


def play(event):
    """
    下棋
    """
    global current_player, game_over
    if game_over:
        return
    col = event.x // CELL_SIZE
    row = event.y // CELL_SIZE
    if board[row][col] != 0:
        return
    board[row][col] = current_player
    draw_piece(canvas, row, col, current_player)
    if check_win(current_player):
        canvas.create_text(BOARD_WIDTH // 2, BOARD_HEIGHT // 2, text="黑子胜" if current_player == 1 else "白子胜", font=("Arial", 30))
        game_over = True
    else:
        current_player = 3 - current_player


# 创建画布
canvas = tk.Canvas(root, width=BOARD_WIDTH, height=BOARD_HEIGHT)
canvas.pack()
# 画棋盘
draw_board(canvas)
# 点击事件
canvas.bind("<Button-1>", play)

# 运行程序
root.mainloop()

运行程序后，可以在窗口中下五子棋。当有一方获胜时，会在窗口中显示胜利信息。