使用方法

var1=tk.IntVar()
var2=tk.IntVar()
def printf():
    if (var1.get()==1)&(var2.get()==0):
        L.config(text='1')
    elif (var1.get()==0)&(var2.get()==1):
        L.config(text='2')
    elif (var1.get()==0)&(var2.get()==0):
        L.config(text='None')
    else:
        L.config(text='Both')
C1=tk.Checkbutton(root,text='A',variable=var1,onvalue=1,offvalue=0,command=printf)
C1.place(x=230,y=100)
C2=tk.Checkbutton(root,text='B',variable=var2,onvalue=1,offvalue=0,command=printf)
C2.place(x=230,y=150)

创建两个选项，当选择第一个选项A时，打印1，选择第二个选项B时，打印2，两个都选打印'Both'，两个都不选打印'None'

完整程序

import tkinter as tk
root=tk.Tk()
root.title('Radiobutton')
screenwidth=root.winfo_screenwidth()
screenheight=root.winfo_screenheight()
width=500
height=300
x=(screenwidth-width)//2
y=(screenheight-height)//2
root.geometry('%dx%d+%d+%d'%(width,height,x,y))
var=tk.StringVar()
L=tk.Label(root,bg='white',width=20,text='       ')
L.place(x=180,y=50)
var1=tk.IntVar()
var2=tk.IntVar()
def printf():
    if (var1.get()==1)&(var2.get()==0):
        L.config(text='1')
    elif (var1.get()==0)&(var2.get()==1):
        L.config(text='2')
    elif (var1.get()==0)&(var2.get()==0):
        L.config(text='None')
    else:
        L.config(text='Both')
C1=tk.Checkbutton(root,text='A',variable=var1,onvalue=1,offvalue=0,command=printf)
C1.place(x=230,y=100)
C2=tk.Checkbutton(root,text='B',variable=var2,onvalue=1,offvalue=0,command=printf)
C2.place(x=230,y=150)
L.mainloop() 

运行结果