使用turtle库绘制倒计时数码管

使用turtle库绘制倒计时数码管

#绘制倒计时数码管
import turtle
turtle.speed(0)#改变速度
turtle.hideturtle()#隐藏小海龟
def drawGap():#绘制数码管间隔
    turtle.penup()
    turtle.fd(5)
def drawLine(draw):#绘制单段数码管
    drawGap()
    turtle.pendown()if draw else turtle.penup()
    turtle.fd(40)
    drawGap()
    turtle.right(90)
def drawDigit(digit):#根据数字绘制七段数码管
    drawLine(True) if digit in [2,3,4,5,6,8,9]  else drawLine(False)
    drawLine(True) if digit in [0,1,3,4,5,6,7,8,9]  else drawLine(False)
    drawLine(True) if digit in [0,2,3,5,6,8,9]  else drawLine(False)
    drawLine(True) if digit in [0,2,6,8]  else drawLine(False)
    turtle.left(90)
    drawLine(True) if digit in [0,4,5,6,8,9]  else drawLine(False)
    drawLine(True) if digit in [0,2,3,5,6,7,8,9]  else drawLine(False)
    drawLine(True) if digit in [0,1,2,3,4,7,8,9]  else drawLine(False)
    turtle.left(180)
    turtle.penup()#为绘制后续数字确定位置
    turtle.fd(30)#为绘制后续数字确定位置
def drawDate(date):
    turtle.pencolor("blue") 
    for i in date:
         drawDigit(eval(i))#通过eval()函数将数字变为整数
def main():
    turtle.setup(1000,500,200,150)
    turtle.penup()
    turtle.fd(-350)
    turtle.pensize(6)
    a='20'
    while eval(a)+1:#保证0也能画出
        drawDate(a)
        turtle.fd(-(80)*len(a))#根据数字位数回到起点
        if a!='0':
            turtle.clear()#清空笔迹
        a=str((int(a)-1))#将a变成整数，减一后再变成字符串
    turtle.done()#结束turtle，方便语句完整性，使turtle窗口不会自动消失
main()