Python 2.7.11 Turtle 图形崩溃

Question

所以我在 Python 2.7.11 中使用海龟图形制作了这段代码：

import turtle

previousMovement = ""
wn = turtle.Screen()
wn.bgcolor("black")

player = turtle.Turtle()
player.color("white")
player.shape("triangle")
player.pencolor("red")

speed = 1

def left():
    global previousMovement
    if previousMovement == "left":
        player.forward(speed)
        previousMovement = "left"
    else:
        player.head(90)
        player.forward(speed)
        previousMovement = "left"

def right():
    global previousMovement
    if previousMovement == "right":
        player.forward(speed)
        previousMovement = "right"
    else:
        player.head(270)
        player.forward(speed)
        previousMovement = "right"


turtle.listen()
turtle.onkey(left, "a")
turtle.onkey(right, "d")

目前它非常简单，但是每当我尝试运行它时，Python Turtle Graphics 窗口就会出现，然后一切都会暂停，然后它会说“无响应”并关闭。我的代码中是否存在导致该问题的原因，或者是另一个问题？

Answer 1

你可以尝试进入turtle主循环：

# other code...
turtle.onkey(right, "d")
turtle.mainloop()

我还发现乌龟需要.setheading(270) 而不是.head(270)。您可能还需要更换另一个。