循环等待直到动作完成

Question

import tkinter as tk
import random


root = tk.Tk()
canvas = tk.Canvas(root, height=600, width=700, bg="#4f75b3")
canvas.pack()

frame = tk.Frame(root, bg="#66bd5e")
frame.place(relx=0.075, rely=0.075, relheight=0.85, relwidth=0.85,)

def destroymole():
    mole.destroy()

xcoords = random.randrange(100, 500, 10)
ycoords = random.randrange(100, 500, 10)

mole = tk.Button(root, text="MOLE", relief="raised", command=destroymole, height=1, width=10, 
bg="brown")
mole.place(x=xcoords, y=ycoords)

for i in range(15):                                                                                
    def destroymole():
        mole.destroy()
        return destroymole()

    xcoords = random.randrange(100, 500, 10)
    ycoords = random.randrange(100, 500, 10)

    mole = tk.Button(root, text="MOLE", relief="raised", command=destroymole, height=1, width=10, 
bg="brown")
    mole.place(x=xcoords, y=ycoords)


root.mainloop()

我怎样才能让循环等到一个“鼹鼠”被摧毁再产生另一个？

另外，会引发错误

RecursionError: 调用 Python 对象时超出最大递归深度

每当我按下多个按钮来销毁它时。

这也有助于解决 destroymole() 不按特定按钮的问题，因为屏幕上一次只有一个痣。

Answer 1

您收到此错误 RecursionError: maximum recursion depth exceeded while calling a Python object 是因为您在无限时间内递归调用函数，即没有 base condition。

    def destroymole():
        mole.destroy()
        return destroymole()

这里destroymole() 正在调用自己并制作stack overflow :) 的recursion stack。

另外，你的销毁痣实现的问题是，你有 15 个痣，但是当你做mole.destroy() 时，它怎么知道要销毁哪个痣？所以你必须将每个痣的引用传递给方法。这可以简化如下--

import tkinter as tk
import random


root = tk.Tk()
canvas = tk.Canvas(root, height=600, width=700, bg="#4f75b3")
canvas.pack()

frame = tk.Frame(root, bg="#66bd5e")
frame.place(relx=0.075, rely=0.075, relheight=0.85, relwidth=0.85,)

# def destroymole():
#     mole.destroy()

xcoords = random.randrange(100, 500, 10)
ycoords = random.randrange(100, 500, 10)

mole = tk.Button(root, text="MOLE", relief="raised", command=mole.destroy, height=1, width=10, bg="brown")
mole.config(command = mole.destroy)
mole.place(x=xcoords, y=ycoords)

for i in range(15):                                                                                
#     def destroymole():
#         mole.destroy()
#         return destroymole()

    xcoords = random.randrange(100, 500, 10)
    ycoords = random.randrange(100, 500, 10)

    mole = tk.Button(root, text="MOLE", relief="raised", height=1, width=10, bg="brown")
    mole.config(command = mole.destroy)
    mole.place(x=xcoords, y=ycoords)
    

root.mainloop()