python编程-14：tkinter绘制接收事件的图形

from tkinter import *
def main():   
    tk = Tk()
    canvas = Canvas(tk, width = 400, height = 400)
    canvas.pack()
    def moverectangle(event):
        if event.keysym == "Up":
            canvas.move(1,0,-5)
        elif event.keysym == "Down":
            canvas.move(1,0,5)
        elif event.keysym == "Left":
            canvas.move(1,-5,0)
        elif event.keysym == "Right":
            canvas.move(1,5,0)
    canvas.create_rectangle(180,180,220,220,fill="red")
    canvas.bind_all("",moverectangle)
    canvas.bind_all("",moverectangle)
    canvas.bind_all("",moverectangle)
    canvas.bind_all("",moverectangle)
if __name__ == '__main__':
    main()