radiobutton 怎么取消默认选择

lengyue869

radiobutton默认会选择第一个,checkbutton有deselect()方法可以取消选择,radiobutton有类似的方法吗?

1. import tkinter as tk
   
2. 
   
3. root=tk.Tk()
   
4. root.geometry('400x200+600+100')
   
5. plant_list=['a','b','c']
   
6. 
   
7. rbText=tk.IntVar()
   
8. 
   
9. def plant_pick():
   
10.     pass
    
11. 
    
12. for plant in plant_list:
    
13.     tk.Radiobutton(root, text=plant, value=plant_list.index(plant), variable=rbText,
    
14.                    command=plant_pick).grid(row=0, column=plant_list.index(plant))
    
15. 
    
16. root.mainloop()

复制代码

lengyue869

tk.Radiobutton(root, text=plant, value=plant_list.index(plant), variable=rbText,
AttributeError: 'NoneType' object has no attribute 'deselect'

lengyue869

Ctrl+.

1. import tkinter as tk
   
2. 
   
3. root=tk.Tk()
   
4. root.geometry('400x200+600+100')
   
5. plant_list=['a','b','c']
   
6. 
   
7. rbText=tk.IntVar()
   
8. rbText.set(None)
   
9. def plant_pick():
   
10.     lb.config(text='you have selected '+plant_list[rbText.get()])
    
11. 
    
12. for plant in plant_list:
    
13.     tk.Radiobutton(root, text=plant, value=plant_list.index(plant), variable=rbText,
    
14.                    command=plant_pick).grid(row=0, column=plant_list.index(plant))
    
15. 
    
16. lb=tk.Label(root,text='',bg='yellow')
    
17. lb.grid(row=3,column=0)
    
18. root.mainloop()

复制代码