使用键盘输入在tkinter画布上移动形状

import tkinter as tk

window = tk.Tk()
canvas = tk.Canvas(window, width=500, height=500)
canvas.pack()

x = 250
y = 250
step = 10

def move_shape(event):
    global x, y
    if event.keysym == 'Up':
        y -= step
    elif event.keysym == 'Down':
        y += step
    elif event.keysym == 'Left':
        x -= step
    elif event.keysym == 'Right':
        x += step
    canvas.delete('all')  # 清空画布
    canvas.create_rectangle(x-10, y-10, x+10, y+10, fill='red')  # 绘制形状

canvas.bind_all('<KeyPress>', move_shape)

window.mainloop()

import tkinter as tk

window = tk.Tk()
canvas = tk.Canvas(window, width=500, height=500)
canvas.pack()

x = 250
y = 250
step = 10

def move_shape(event):
    global x, y
    if event.keysym == 'Up':
        y -= step
    elif event.keysym == 'Down':
        y += step
    elif event.keysym == 'Left':
        x -= step
    elif event.keysym == 'Right':
        x += step
    canvas.delete('all')
    canvas.create_rectangle(x-10, y-10, x+10, y+10, fill='red')

canvas.bind_all('<KeyPress>', move_shape)

window.mainloop()