Python精灵模块的Spinbox指令

from sprites import Screen,Spinbox,StringVar

def show_demo():
    n = spinval.get()
    screen.title(n)
        
screen = Screen()
screen.setup(800,600)
screen.xy_grid()

spinval = StringVar()
sp = Spinbox(350,140,textvariable=spinval,font=('黑体',12,'normal'),
             command=show_demo,width=10,from_=3, to=72)

# 绑定回车，敲回车也会调用show_demo函数
sp.bind("",lambda event:show_demo() )

screen.mainloop()