点击按钮改变标签内容（采用lambda函数方式）

from Tkinter import*



window=Tk()



counter=IntVar()

counter.set(0)



def click(variable,value):

    variable.set(variable.get()+value)



frame=Frame(window)

frame.pack()



button1=Button(frame,text='UP',command=lambda:click(counter,1))

button1.pack()

button2=Button(frame,text='DOWN',command=lambda:click(counter,-1))

button2.pack()



label=Label(frame,textvariable=counter)

label.pack()



window.mainloop()