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()

 from tkinter import *

 def printSelection():

     lab.config(text="你是"+var.get())

 root =Tk()

 root.title("tkiner单选")

 var = StringVar()

 var.set("男生")

 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="男生",command=printSelection)

 rbman.pack()

 rbwoman=Radiobutton(root,text="女生",variable=var,value="女生",command=printSelection)

 rbwoman.pack()

 rbwoman.pack()

 root.mainloop()