python tkinter + turtle 通过鼠标点击画布上的某处，移动已经使用海龟绘制好的图形，但没有反应

问题遇到的现象和发生背景

python 使用 tkinter + turtle 通过鼠标点击画布的某处，移动已经绘制好的图形

问题相关代码，请勿粘贴截图

import turtle
import tkinter as tk

root = tk.Tk()
root.geometry('500x500')
cv = tk.Canvas(root, height=500, width=500, bg='white')
cv.pack()
pen = turtle.RawTurtle(cv)

#圆移动前后的圆心位置
old_x = 0
old_y = 150
new_x = 0
new_y = 150

#画圆
def drawCicle():
    pen.penup()
    pen.sety(150)
    pen.fillcolor('yellow')
    pen.begin_fill()
    pen.color('yellow')
    pen.circle(30)
    pen.end_fill()
    pen.pendown()
    pen.penup()
    pen.home()

#移动
def move(old_x,old_y,new_x,new_y):
   #因为tkinter 和 turtle 的坐标体系不同，要转换
    x = old_x + 250
    y = 250 - old_y
    allID = cv.find_closest(x,y)
    click_id = allID[0]
    cv.move(click_id,new_x-250,250-new_y)

#获取鼠标位置并移动
def cursorxy(event):
    global old_x,old_y,new_x,new_y
    old_x = new_x
    old_y = new_y
    new_x = event.x - 250
    new_y = 250 - event.y
    move(old_x,old_y,new_x,new_y)
   
def main():
   cv.bind("<Double-Button-1>",cursorxy)
   drawCicle()
   


   root.mainloop()

if __name__ == '__main__':
    main()

运行结果及报错内容

运行结果：无论鼠标怎么点击 ，圆没有移动

我的解答思路和尝试过的方法

我想要达到的结果

圆移动到鼠标点击的位置

import turtle
import tkinter as tk

root = tk.Tk()
root.geometry('500x500')
cv = tk.Canvas(root, height=500, width=500, bg='white')
cv.pack()
pen = turtle.RawTurtle(cv)

# 圆移动前后的圆心位置
old_x = 0
old_y = 150
new_x = 0
new_y = 150


# 画圆
def drawCicle():
    pen.penup()
    pen.sety(150)
    pen.fillcolor('yellow')
    pen.begin_fill()
    pen.color('yellow')
    pen.circle(30)
    pen.end_fill()
    pen.pendown()
    pen.penup()
    pen.home()


# 移动
def move(old_x, old_y, new_x, new_y):
    # 因为tkinter 和 turtle 的坐标体系不同，要转换
    x = old_x + 250
    y = 250 - old_y
    allID = cv.find_closest(x, y)
    click_id = allID[0]
    cv.move(click_id, new_x - 250, 250 - new_y)


# 获取鼠标位置并移动
def cursorxy(event):
    global old_x, old_y, new_x, new_y
    old_x = new_x
    old_y = new_y
    new_x = event.x - 250
    new_y = 250 - event.y
    move(old_x, old_y, new_x, new_y)


def main():
    cv.bind("<Double-Button-1>", cursorxy)
    drawCicle()

    root.mainloop()


if __name__ == '__main__':
    main()

修改此处（同时可以将move()函数删除、new_x和new_y这两个全局变量删除）：

# 获取鼠标位置并移动
def cursorxy(event):
    global old_x, old_y  # , new_x, new_y
    # old_x = new_x
    # old_y = new_y
    # new_x = event.x - 250
    # new_y = 250 - event.y
    # move(old_x, old_y, new_x, new_y)
    for i in cv.find_all():
        cv.move(i, event.x - old_x, event.y - old_y)
    old_x = event.x
    old_y = event.y