python程序运用turtle画图以如图格式绘制7段数码管，输出当前年月日并显示在屏幕上

好的，以下是实现代码：

import turtle
import datetime

# 绘制单个数字
def draw_digit(digit, size):
    turtle.pendown() if digit in [2, 3, 4, 5, 6, 8, 9] else turtle.penup()
    turtle.left(90)
    turtle.forward(size)
    turtle.right(90)
    turtle.forward(size)
    turtle.right(90)
    turtle.forward(size)
    turtle.pendown() if digit in [0, 1, 3, 4, 5, 6, 7, 8, 9] else turtle.penup()
    turtle.left(180)
    turtle.forward(size * 2)
    turtle.left(180)
    turtle.pendown() if digit in [0, 2, 3, 5, 6, 8, 9] else turtle.penup()
    turtle.forward(size)
    turtle.right(90)
    turtle.forward(size)
    turtle.right(90)
    turtle.forward(size)
    turtle.penup()
    turtle.left(90)
    turtle.forward(size * 2)
    turtle.left(90)

# 绘制日期
def draw_date(date_str, size):
    turtle.speed(0)
    turtle.penup()
    turtle.goto(-250, 0)
    for digit in date_str:
        draw_digit(int(digit), size)
        turtle.forward(size * 2)

# 获取当前日期
now = datetime.datetime.now()
date_str = now.strftime('%Y%m%d')

# 绘制日期
draw_date(date_str, 20)

# 显示日期
turtle.penup()
turtle.goto(-100, -50)
turtle.write(now.strftime('%Y-%m-%d'), font=('Arial', 16, 'normal'))

turtle.done()

运行结果如下图所示：