课堂练习（条件、循环、函数定义、字符串操作）

画五角星

import turtle
for i in range(5):
    turtle.forward(200)
    turtle.right(144)

画同心圆

import turtle
for i in range(4):
    turtle.penup()
    turtle.goto(0,-40*i)
    turtle.pendown()
    turtle.circle(40*i)

画太阳花

import turtle
turtle.color(‘yellow‘,‘red‘)
turtle.speed(‘fastest‘)
turtle.begin_fill()
while True:
    turtle.forward(150)
    turtle.left(200)
    if abs(turtle.pos())<1:
        break
turtle.end_fill()
turtle.done()

画五星红旗

import turtle

turtle.setup(600,400,0,0)

turtle.color("yellow")
turtle.bgcolor("red")
turtle.fillcolor("yellow")

def yyj_goto(x,y):
    turtle.up()
    turtle.goto(x,y)
    turtle.down()

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

yyj_goto(-600,220)
yyj_draw(150)

yyj_goto(-400,295)
yyj_draw(50)

yyj_goto(-350,212)
yyj_draw(30)

yyj_goto(-350,145)
yyj_draw(30)

yyj_goto(-400,90)
yyj_draw(30)

画钻石花

import turtle

turtle.color("blue")

for i in range(35):
    turtle.right(12)
    for i in range(2):
        turtle.forward(150)
        turtle.right(30)
        turtle.forward(100)
        turtle.right(150)

学号输入

def shibie(studentID):
    if len(studentID)<12:
        print("请输入正确的学号！")
    elif studentID.isdigit() != True:
        print("请输入正确的学号！")
    else:
        grade = studentID[0:4]
        profession = studentID[4:8]
        order = studentID[10:12]
        print("年级：{}级".format(grade))
        if profession == "0611":
            print("专业:网络工程")
        print("序号:{}".format(order))

studentID = input("请输入学号：")
shibie(studentID)

查看星期

def weekday(week):
    week=int(week)
    if 0<week<8:
        i=week-1
        str=[‘星期一‘,‘星期二‘,‘星期三‘,‘星期四‘,‘星期五‘,‘星期六‘,‘星期日‘]
        print("数字{}是{}".format(week,str[i]))
    else:
        print("输入有误")
week=input("输入1~7内的数字：")
weekday(week)

输入身份证

import time

#省份对应字典
provinces = {
    44:‘广东省‘,
}

def shibie(IDcard):
    province = IDcard[0:2]
    birthYear = IDcard[6:10]
    localYear = time.strftime(‘%Y‘)
    age = int(localYear) - int(birthYear)
    sex = IDcard[16:17]
    print("省份为：",provinces.get(int(province)))
    print("年龄为：{}".format(age))
    if int(sex) % 2 == 0:
        print("性别：女")
    else:
        print("性别：男")

IDcard = input("请输入身份证:")
shibie(IDcard)