class Radiobutton 放在类中出错

mosa123

1. from tkinter import *
   
2. 
   
3. class Speed:
   
4.     def __init__(self,root):
   
5.         speedFrame = Frame(root)
   
6.         speed = IntVar()
   
7.         speed_F = Radiobutton(speedFrame, text='Fast', variable=speed, value=1)
   
8.         speed_S = Radiobutton(speedFrame, text='Slow', variable=speed, value=0)
   
9.         speed_F.pack()
   
10.         speed_S.pack()
    
11.         speedFrame.pack()
    
12. 
    
13. root = Tk()
    
14. 
    
15. speed = Speed(root)
    
16. 
    
17. speedFrame = Frame(root)
    
18. speed = IntVar()
    
19. speed_F = Radiobutton(speedFrame, text='Fast2', variable=speed, value=1)
    
20. speed_S = Radiobutton(speedFrame, text='Slow2', variable=speed, value=0)
    
21. speed_F.pack()
    
22. speed_S.pack()
    
23. speedFrame.pack()
    
24. 
    
25. mainloop()

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Radiobutton写到class中就出错了，（1）鼠标滑过时会被选中，（2）不能显示默认项。求教这是为什么？

Pliosauroidea

1. 
   
2. from tkinter import *
   
3. 
   
4. class Speed:
   
5.     def __init__(self,root):
   
6.         speedFrame = Frame(root)
   
7.         self.speed = IntVar()
   
8.         self.speed_F = Radiobutton(speedFrame, text='Fast', variable=speed, value=1)
   
9.         self.speed_S = Radiobutton(speedFrame, text='Slow', variable=speed, value=0)
   
10.         self.speed_F.pack()
    
11.         self.speed_S.pack()
    
12.         speedFrame.pack()
    
13. 
    
14. root = Tk()
    
15. 
    
16. speed = Speed(root)
    
17. 
    
18. speedFrame = Frame(root)
    
19. speed = IntVar()
    
20. speed_F = Radiobutton(speedFrame, text='Fast2', variable=speed, value=1)
    
21. speed_S = Radiobutton(speedFrame, text='Slow2', variable=speed, value=0)
    
22. speed_F.pack()
    
23. speed_S.pack()
    
24. speedFrame.pack()
    
25. 
    
26. mainloop()

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Twilight6

类中 speed 重新赋值导致触发屏蔽机制，试试这样：

1. from tkinter import *
   
2. 
   
3. class Speed:
   
4.     def __init__(self,root):
   
5.         global speed
   
6.         speedFrame = Frame(root)
   
7.         speed2 = IntVar()
   
8.         speed_F = Radiobutton(speedFrame, text='Fast', variable=speed2, value=1)
   
9.         speed_S = Radiobutton(speedFrame, text='Slow', variable=speed2, value=0)
   
10.         speed_F.pack()
    
11.         speed_S.pack()
    
12.         speedFrame.pack()
    
13. 
    
14. root = Tk()
    
15. 
    
16. speed = Speed(root)
    
17. 
    
18. speedFrame = Frame(root)
    
19. speed1 = IntVar()
    
20. speed_F = Radiobutton(speedFrame, text='Fast2', variable=speed1, value=1)
    
21. speed_S = Radiobutton(speedFrame, text='Slow2', variable=speed1, value=0)
    
22. speed_F.pack()
    
23. speed_S.pack()
    
24. speedFrame.pack()
    
25. 
    
26. mainloop()

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或者在 __init__ 下 添加一行 global speed

mosa123

贴上运行正确的代码

1. from tkinter import *
   
2. 
   
3. class Speed:
   
4.     def __init__(self,root):
   
5.         root.speedFrame = Frame(root)
   
6.         self.speed = IntVar()
   
7.         speed_F = Radiobutton(root.speedFrame, text='Fast', variable=self.speed, value=1)
   
8.         speed_S = Radiobutton(root.speedFrame, text='Slow', variable=self.speed, value=0)
   
9.         speed_F.pack()
   
10.         speed_S.pack()
    
11.         root.speedFrame.pack()
    
12. 
    
13. root = Tk()
    
14. speed = Speed(root)
    
15. 
    
16. 
    
17. mainloop()

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