条件、循环、函数定义、字符串操作练习

循环画五角星
import turtle
turtle.color("yellow")
turtle.fillcolor("yellow")
turtle.begin_fill()
for i in range(5):
     turtle.forward(100)
     turtle.right(144)
turtle.end_fill()

循环画同心圆
import turtle
for i in range(5):
     turtle.up()
     turtle.goto(0,-35*i)
     turtle.down()
     turtle.circle(35*i)

太阳花

import turtle
turtle.fillcolor("yellow")
turtle.begin_fill()
while True:
    turtle.forward(250)
    turtle.left(170)
    if(abs(turtle.pos())<1):
        break
turtle.end_fill()

五个五角星
import turtle
turtle.setup(600,400,0,0)
turtle.bgcolor("red")
turtle.color("yellow")
turtle.fillcolor("yellow")
def z_goto(x,y):
    turtle.up()
    turtle.goto(x,y)
    turtle.down()
def z_draw(m,n):
    turtle.begin_fill()
    for i in range(5):
        turtle.forward(m)
        turtle.left(n)
    turtle.end_fill()
    
z_goto(-270,120)
z_draw(100,-144)

z_goto(-140,150)
turtle.left(10)
z_draw(30,144)

z_goto(-100,110)
turtle.right(18)
z_draw(30,144)

z_goto(-100,60)
turtle.left(10)
z_draw(30,-144)

z_goto(-135,10)
turtle.left(10)
z_draw(30,144)

钻石花瓣太阳花
import turtle
turtle.color("yellow")
turtle.fillcolor("red")
turtle.begin_fill()
def draw(t):
   t.fd(80)
   t.right(45)
   t.fd(80)
   t.right(135)
for i in range(36):
    draw(turtle)
    draw(turtle)
    turtle.left(10)
turtle.end_fill()

输入学号，识别年级、专业、序号
id = input("请输入学生的学号：")
print("该生年级为：%s 专业为：%s 班级学号为：%s"%(id[0:4],id[4:8],id[8:]))

输入1-7的数字，输出对应的“星期几
s = "星期一星期二星期三星期四星期五星期六星期日"
i = int(eval(input("请输入1-7的数字：")))
if(i>7):
  print("输入的数字为无效数字")
print(s[3*(i-1):3*i])

识别身份证号中的省市区、年龄、性别
id = input("请输入身份证号：")
if len(id)!=18:
    print("无效身份证！")
    exit(0)
else:
    address=int(id[0:6])
    year=int(id[6:10])
    sex=int(id[17])
if address==440000:
    print("省市区为：广东省")
elif address==440100:
    print("省市区为：广东省广州市")
elif address==440101:
    print("省市区为：广东省广州市市辖区")
elif address==440102:
    print("省市区为：广东省广州市东山区")
elif address==440103:
    print("省市区为：广东省广州市荔湾区")
elif address==440104:
    print("省市区为：广东省广州市越秀区")
elif address==440105:
    print("省市区为：广东省广州市海珠区")
elif address==440106:
    print("省市区为：广东省广州市天河区")
elif address==440107:
    print("省市区为：广东省广州市芳村区")
elif address==440111:
    print("省市区为：广东省广州市白云区")
elif address==440112:
    print("省市区为：广东省广州市黄埔区")
elif address==440181:
    print("省市区为：广东省广州市番禺区")
elif address==440182:
    print("省市区为：广东省广州市花都区")
elif address==440183:
    print("省市区为：广东省广州市增城区")
elif address==440184:
    print("省市区为：广东省广州市从化区")
else:
    print("无法查到信息！")#不在广东省广州市内的
    exit(0)
if sex%2==0:
    print("性别为：女性")
else:
    print("性别为：男性")
print("您今年%d"%(2017-year)+"岁")

用字符串操作生成python文档各库的网址
s = "https://docs.python.org/3.6/library/"
m = ".html"
n = input("请输入关键英文：")
print("生成的网址为：%s%s%s"%(s,n,m))