函数定义与使用，字符串类型

import turtle
 
turtle.bgcolor("red")
turtle.fillcolor("yellow")
turtle.color('yellow')
turtle.speed(10)
 
turtle.begin_fill()
turtle.up()
turtle.goto(-600,220)
turtle.down()
for i in range (5):   
    turtle.forward(150)
    turtle.right(144)
turtle.end_fill()
 
 
turtle.begin_fill()
turtle.up()
turtle.goto(-400,295)
turtle.setheading(305)
turtle.down()
for i in range (5):   
    turtle.forward(50)
    turtle.left(144)
 
turtle.end_fill()
 
 
 
turtle.begin_fill()
turtle.up()
turtle.goto(-350,212)
turtle.setheading(30)
turtle.down()
for i in range (5): 
    turtle.forward(50)
    turtle.right(144)
 
turtle.end_fill()
 
 
turtle.begin_fill()
turtle.up()
turtle.goto(-350,145)
turtle.setheading(5)
turtle.down()
for i in range (5):  
    turtle.forward(50)
    turtle.right(144)
 
turtle.end_fill()
 
 
turtle.begin_fill()
turtle.up()
turtle.goto(-400,90)
turtle.setheading(300)
turtle.down()
for i in range (5): 
    turtle.forward(50)
    turtle.left(144)
 
turtle.end_fill()

stuNum = '201709080018'
print('年级是：'+stuNum[0:4])
print('专业编号是：'+stuNum[4:9])
print('序号是：'+stuNum[-3:])

IDNo= '440682199901084345'
print('省市是：'+IDNo[0:2])
print('生日是：'+IDNo[-8:-4])
print('性别是：'+IDNo[-2])