tkinter的单选Radiobutto

from tkinter import *
def printSelection():
    num = var.get()
    if num == 1:
        lab.config(text="你是男生")
    else:
        lab.config(text="你是女生")

root =Tk()
root.title("tkiner单选")

var = IntVar()
var.set(1)

lab = Label(root,text="这是预设，尚未选择",bg="lightyellow",width=30)
lab.pack()
rbman=Radiobutton(root,text="男生",variable=var,value=1,command=printSelection)
rbman.pack()
rbwoman=Radiobutton(root,text="女生",variable=var,value=2,command=printSelection)
rbwoman.pack()

rbwoman.pack()
root.mainloop()

 用StringVar()代替IntVar()简化4-8行

 1 from tkinter import *
 2 def printSelection():
 3     lab.config(text="你是"+var.get())
 4 
 5 
 6 root =Tk()
 7 root.title("tkiner单选")
 8 
 9 var = StringVar()
10 var.set("男生")
11 
12 lab = Label(root,text="这是预设，尚未选择",bg="lightyellow",width=30)
13 lab.pack()
14 rbman=Radiobutton(root,text="男生",variable=var,value="男生",command=printSelection)
15 rbman.pack()
16 rbwoman=Radiobutton(root,text="女生",variable=var,value="女生",command=printSelection)
17 rbwoman.pack()
18 
19 rbwoman.pack()
20 root.mainloop()