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Question

我开始玩弄我高中时写的一个程序，我知道我不记得我到底做了什么，但现在每次我运行下面的代码时，它都会给我一个名称错误，而且我已经很久没有玩海龟了，我不知道我做错了什么。你们帮了这么大的忙，让代码第一次工作，我想也许你们可以帮助像我这样的业余爱好者

我相信这可能是因为python版本现在不同了（编写于3.5中，试图在3.6中运行），但我不确定我是否认为我只是把某个地方弄糟了，只是我没有足够的智慧来解决它

from random import randint
from turtle import Turtle, Screen

class MyTurtle(Turtle):

    def petals(self, size=30, count=8, speed=100):
        if size == 30:
            self.begin_fill()

        if size > 0:  # drawing leading edge of petal
            self.fd(3)
            self.rt(3)

            screen.ontimer(lambda: self.petals(size - 1, count, speed), speed)
            return

        if size == 0:  # switch to other edge of petal
            self.rt(90)

        if size > -30:  # drawing trailing edge of petal
            self.fd(3)
            self.rt(3)

            screen.ontimer(lambda: self.petals(size - 1, count, speed), speed)
            return

        self.end_fill()  # finish this petal
        self.lt(230) # prepare for the next petal

        if count > 0:  # drawing the next petal
            screen.ontimer(lambda: self.petals(count=count - 1, speed=speed), speed)
            return

        self.hideturtle()  # finished drawing

    def flowerhead(self):
        self.pencolor('red')   #outlines the flowerpetals in red to see easier
        self.petals(speed=9)   

       # self.petals(speed=randint(50, 250))

def flower1():
    todd.color('green', 'blue')
    todd.goto(0, -270)
    todd.penup()
    todd.showturtle()
    todd.goto(0,0)
    todd.pendown()
    todd.flowerhead()

def flower2():
    tony.color('green', 'purple')
    tony.penup()
    tony.goto(0, -200)
    tony.pendown()
    tony.showturtle()
    tony.goto(80, -15)
    tony.seth(0)
    tony.flowerhead()

def flower3():
    tina.color('green', 'turquoise')
    tina.penup()
    tina.goto(0, -200)
    tina.pendown()
    tina.showturtle()
    tina.goto(-80, -15)
    tina.seth(90)
    tina.flowerhead()

def flower4():
    tiny.color('green', 'black')
    tiny.penup()
    tiny.goto(0, -200)
    tiny.pendown()
    tiny.showturtle()
    tiny.goto(160, -25)
    tiny.seth(90)
    tiny.flowerhead()


def flower5():
    tweeny.color('green', 'pink')
    tweeny.penup()
    tweeny.goto(0, -200)
    tweeny.pendown()
    tweeny.showturtle()
    tweeny.goto(-160, -25)
    tweeny.seth(90)
    tweeny.flowerhead()

def writing():
    teacher.penup()
    teacher.setpos(0, 120)
    teacher.pendown()
    teacher.color('red')
    teacher.write('test', align='center', font=('Times New Roman', 30, 'normal'))

tony = MyTurtle(shape='turtle', visible=False)
todd = MyTurtle(shape='turtle', visible=False)
tina = MyTurtle(shape='turtle', visible=False)
tiny = MyTurtle(shape='turtle', visible=False)
tweeny = MyTurtle(shape='turtle', visible=False)
teacher = MyTurtle(shape='turtle', visible=False)

screen = getScreen()
screen.title('I am epic')
screen.delay(0)

screen.ontimer(flower2, 6500)
screen.ontimer(flower4, 0)
screen.ontimer(flower3, 6500)
screen.ontimer(flower5, 0)
screen.ontimer(flower1, 13000)

screen.ontimer(writing, 26000)

screen.mainloop()

给我错误的那一行是

^{pr2}$

就像我说的，我认为这是版本，但我希望第二，第三，甚至第四个意见我只是一个学生试图学习如何不愚蠢

Answer 1

您将scree定义为get screen，如下所示：

screen=getScreen()

这是调用屏幕的旧版本 尝试使用新版本

^{pr2}$