from tkinter import *

t=Tk()

t.title("复选框")

t.geometry("300x300")

def f():

a=v.get()

l1.config(text=a)

v=IntVar()

v.set(0)

c1=Checkbutton(t,text="选择",variable=v,onvalue=1,offvalue=0,command=f)

c1.pack()

l1=Label(t,text="0",fg="red")

l1.pack()

t.mainloop()