python turtle 显示8*8的重力四子棋，用turtle.getcanvas显示鼠标所在的竖列

以下是一个示例代码，可以实现显示8*8的重力四子棋，并且用turtle.getcanvas显示鼠标所在的竖列：

import turtle

# 定义棋盘大小和格子大小
board_size = 8
cell_size = 50

# 初始化turtle画布和画笔
canvas = turtle.getcanvas()
canvas.config(cursor="arrow")
pen = turtle.Turtle()
pen.speed(0)
pen.hideturtle()

# 定义棋盘二维数组
board = [[0 for i in range(board_size)] for j in range(board_size)]

# 定义落子函数
def drop_piece(column, player):
    for row in range(board_size-1, -1, -1):
        if board[row][column] == 0:
            board[row][column] = player
            return True
    return False

# 定义绘制棋盘函数
def draw_board():
    pen.penup()
    pen.goto(-board_size*cell_size/2, board_size*cell_size/2)
    pen.pendown()
    for i in range(board_size+1):
        pen.forward(cell_size*board_size)
        pen.right(90)
        pen.forward(cell_size)
        pen.left(90)
        pen.forward(cell_size*board_size)
        pen.left(90)
        pen.forward(cell_size)
        pen.right(90)
    pen.penup()

# 定义绘制棋子函数
def draw_piece(row, col, player):
    pen.penup()
    pen.goto(col*cell_size-cell_size/2, -row*cell_size+cell_size/2)
    pen.pendown()
    pen.dot(cell_size*0.8, player)

# 定义显示鼠标所在竖列函数
def show_column(x, y):
    column = int((x+board_size*cell_size/2)//cell_size)
    if column >= 0 and column < board_size:
        canvas.config(cursor="hand1")
        pen.clear()
        pen.penup()
        pen.goto(column*cell_size-cell_size/2, board_size*cell_size/2)
        pen.pendown()
        pen.forward(cell_size*board_size)
        canvas.coords(canvas.text, column*cell_size, board_size*cell_size+10)
        canvas.itemconfigure(canvas.text, text=f'Column: {column}')
    else:
        canvas.config(cursor="arrow")
        pen.clear()
        canvas.itemconfigure(canvas.text, text='')

# 初始化棋盘和鼠标事件
draw_board()
canvas.bind('<Motion>', show_column)
canvas.text = canvas.create_text(board_size*cell_size/2, board_size*cell_size+10, text='', font=('Arial', 12))

# 开始游戏
player = 1
while True:
    column = int(input(f'Player {player}, choose a column (0-{board_size-1}): '))
    if drop_piece(column, player):
        draw_piece(board_size-1, column, player)
        player = 3 - player  # 切换玩家