python - 销毁 Tkinter 图像小部件 (Python) 后的回溯错误
问题描述
我有一个程序在你的屏幕上快速闪烁红色和蓝色,它有一个停止按钮。当按下停止按钮时,闪烁的停止,但我也得到一堵相同的错误墙,它们走得如此之快,我可以大麦阅读它们。这是错误:
Traceback (most recent call last):
File "C:\Users\Mihkel\AppData\Local\Programs\Python\Python37-32\lib\tkinter\__init__.py", line 1702, in __call__
return self.func(*args)
File "C:\Users\Mihkel\AppData\Local\Programs\Python\Python37-32\lib\tkinter\__init__.py", line 746, in callit
func(*args)
File "C:\Users\Mihkel\Desktop\epiloop\Assets\example.py", line 27, in re
label2.configure(image=redi)
File "C:\Users\Mihkel\AppData\Local\Programs\Python\Python37-32\lib\tkinter\__init__.py", line 1482, in configure
return self._configure('configure', cnf, kw)
File "C:\Users\Mihkel\AppData\Local\Programs\Python\Python37-32\lib\tkinter\__init__.py", line 1473, in _configure
self.tk.call(_flatten((self._w, cmd)) + self._options(cnf))
_tkinter.TclError: invalid command name ".!label"
Exception in Tkinter callback
Traceback (most recent call last):
File "C:\Users\Mihkel\AppData\Local\Programs\Python\Python37-32\lib\tkinter\__init__.py", line 1702, in __call__
return self.func(*args)
File "C:\Users\Mihkel\AppData\Local\Programs\Python\Python37-32\lib\tkinter\__init__.py", line 746, in callit
func(*args)
File "C:\Users\Mihkel\Desktop\epiloop\Assets\example.py", line 31, in blu
label2.configure(image=bluei)
File "C:\Users\Mihkel\AppData\Local\Programs\Python\Python37-32\lib\tkinter\__init__.py", line 1482, in configure
return self._configure('configure', cnf, kw)
File "C:\Users\Mihkel\AppData\Local\Programs\Python\Python37-32\lib\tkinter\__init__.py", line 1473, in _configure
self.tk.call(_flatten((self._w, cmd)) + self._options(cnf))
_tkinter.TclError: invalid command name ".!label"
Exception in Tkinter callback
Traceback (most recent call last):
File "C:\Users\Mihkel\AppData\Local\Programs\Python\Python37-32\lib\tkinter\__init__.py", line 1702, in __call__
return self.func(*args)
File "C:\Users\Mihkel\AppData\Local\Programs\Python\Python37-32\lib\tkinter\__init__.py", line 746, in callit
func(*args)
File "C:\Users\Mihkel\Desktop\epiloop\Assets\example.py", line 31, in blu
label2.configure(image=bluei)
File "C:\Users\Mihkel\AppData\Local\Programs\Python\Python37-32\lib\tkinter\__init__.py", line 1482, in configure
return self._configure('configure', cnf, kw)
File "C:\Users\Mihkel\AppData\Local\Programs\Python\Python37-32\lib\tkinter\__init__.py", line 1473, in _configure
self.tk.call(_flatten((self._w, cmd)) + self._options(cnf))
_tkinter.TclError: invalid command name ".!label"
这是代码:
from tkinter import*
root = Tk()
root.geometry("500x500")
root.title("test")
time_interval = 260
#define images
redi = PhotoImage(file="red.gif")
bluei = PhotoImage(file="blue.gif")
def createimg2():#create the image that will later be reconfigured to make it flash
global label2
label2 = Label(root, image=redi)
label2.image1 = redi
label2.image2 = bluei
label2.pack()
label2.place(x=0, y=0)
createimg2()
#the 4 following methods are what make the image flash
def re():
root.after(time_interval, blu)
label2.configure(image=redi)
def blu():
root.after(time_interval, re)
label2.configure(image=bluei)
def rbgo():
root.after(time_interval, re)
def rb():
re()
blu()
rbgo()
rb()
def kill(): #remove the flashing image
label2.destroy()
btn = Button(root, text="stop", height=2, width=3, command=kill)
btn.pack(pady=100)
root.mainloop()
我认为问题在于它label1
是一个全局变量。有没有办法我不能让它成为一个全局变量并让它仍然有效?注意:我需要在方法中创建标签,因为这实际上是一个更大项目的片段。
解决方案
销毁标签不会停止尝试重新配置该标签的功能。它只会让他们失败。该kill
函数应该做一些导致变色函数停止的事情。例如:
flag = True
def re():
if flag:
root.after(time_interval, blu)
label2.configure(image=redi)
def blu():
if flag:
root.after(time_interval, re)
label2.configure(image=bluei)
def kill(): #remove the flashing image
global flag
flag = False
label2.destroy()
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