Question

Python tkinter 用键盘移动没反映，如何修改代码

以下代码怎么没效果啊，谁能帮一下，目的是按方向键移动一个三角箭头。
from tkinter import *
tk=Tk()
canvas=Canvas(tk,width=400,height=400)
canvas.pack()
a1=canvas.create_polygon(10,10,10,60,50,35)
def movetriangle(event):
if event.keysym == 'up':
canvas.move(a1,0,-3)
elif event.keysym == 'Down':
canvas.move(a1,0,3)
elif keysym == 'Left':
canvas.move(a1,-3,0)
elif keysym == 'Right':
canvas.move(a1,3,0)
canvas.bind_all('<keyPress-Up>',movetriangle)
canvas.bind_all('<keyPress-Down>',movetriangle)
canvas.bind_all('<keyPress-Left>',movetriangle)
canvas.bind_all('<keyPress-Right>',movetriangle)

Answer 1

from tkinter import *

def movetriangle(event):
    if event.keysym == 'Up':
        canvas.move(a1,0,-3)
    elif event.keysym == 'Down':
        canvas.move(a1,0,3)
    elif event.keysym == 'Left':
        canvas.move(a1,-3,0)
    elif event.keysym == 'Right':
        canvas.move(a1,3,0)

tk=Tk()
canvas=Canvas(tk,width=400,height=400)
a1=canvas.create_polygon(10,10,10,60,50,35)
canvas.bind_all('<KeyPress-Up>',movetriangle)
canvas.bind_all('<KeyPress-Down>',movetriangle)
canvas.bind_all('<KeyPress-Left>',movetriangle)
canvas.bind_all('<KeyPress-Right>',movetriangle)
canvas.pack()

#你的代码要么变量取错，要么单词写错，好好比较一下吧，看看和你的有什么不一样