函数定义与使用，字符串类型

import turtle
turtle.setup(600,400,0,0)
turtle.bgcolor('red')
turtle.color('yellow')
turtle.fillcolor('yellow')

def mygoto(x,y):
    turtle.penup()
    turtle.goto(x,y)
    turtle.pendown()

def draw5jx(r):
    turtle.begin_fill()
    for i in range(5):
        turtle.forward(r)
        turtle.right(144)
    turtle.end_fill()

mygoto(-250,75)
draw5jx(100)

mygoto(-140,165)
draw5jx(50)

mygoto(-70,125)
draw5jx(50)

mygoto(-70,15)
draw5jx(50)

mygoto(-140,-30)
draw5jx(50)

turtle.done()

stuNum='201709090067'
print('年级是：'+stuNum[0:4])
print('专业编号是：'+stuNum[4:9])
print('序号是：'+stuNum[-3:])

IDNo='440802199708230442'
print('性别是：'+IDNo[-2])
print('市区是：'+IDNo[0:6])
print('生日是：'+IDNo[6:13])