#encoding=utf-8import tkinter as tkwindow = tk.Tk()window.title("测试单选框")window.geometry("400x200")var = tk.StringVar()label_1 = tk.Label(window,bg="yellow",textvar=var,width=10,height=1,text="label_1")label_1.pack()def print_selection(): #label的config函数可以改变label对象里定义的参数的值 label_1.config(text= "你选择了选项: " + var.get()) label_1.config(bg="green") label_1.config(width=12)#定义单选按钮，var=var,value="A" 指把value的值赋值给varradiobutton_1 = tk.Radiobutton(window,text="选项A",var=var,value="A",command=print_selection)radiobutton_1.pack()radiobutton_2 = tk.Radiobutton(window,text="选项B",var=var,value="B",command=print_selection)radiobutton_2.pack()radiobutton_3 = tk.Radiobutton(window,text="选项C",var=var,value="C",command=print_selection)radiobutton_3.pack()window.mainloop()