python 9.13作业

2-a 用循环画五角星

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

2-b 用循环画同心圆

import turtle
turtle.color(‘red‘)
for i in range(4):
    turtle.up()
    turtle.goto(0,-40*(i+1))
    turtle.down()
    turtle.circle(40*(i+1))

2-c 用while循环画太阳花

from turtle import *
color(‘red‘,‘yellow‘)
begin_fill()
while True:
    forward(200)
    left(170)
    if abs(pos())<1:
        break
end_fill()
done()

2-d 用函数定义画五个五角星

import turtle
turtle.bgcolor(‘red‘)
turtle.color(‘yellow‘)
turtle.fillcolor(‘yellow‘)

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

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

guo_goto(-300,200)
guo_draw(170)

guo_goto(30,280)
guo_draw(60)

guo_goto(120,200)
guo_draw(60)

guo_goto(120,126)
guo_draw(60)

guo_goto(30,60)
guo_draw(60)

2-e 用函数定义画钻石花瓣的太阳花

import turtle

def draw_diamond(brad):
    brad.forward(100)
    brad.right(45)
    brad.forward(100)
    brad.right(135)
def draw_art():
    window=turtle.Screen()
    window.bgcolor("purple")

    brad=turtle.Turtle()
    brad.shape("turtle")
    brad.color("orange")
    brad.speed("fastest")
    for i in range(1,37):
        draw_diamond(brad)
        draw_diamond(brad)
        brad.left(10)
    brad.right(90)
    brad.pensize(5)
    brad.color(‘green‘)
    brad.forward(300)
    window.exitonclick()
draw_art()

3-a 输入学号，识别年级、专业、序号。

s=input("Please input your Student Number：")
print("年级是",s[:4])
print("专业是",s[4:6])
print("序号是",s[-3:])

3-b 输入1-7的数字，输出对应的“星期几”。

a=‘星期一星期二星期三星期四星期五星期六星期日‘
d=int(input(‘1-7:‘))
print(a[3*(d-1):3*d])

3-c 识别身份证号中的省市区、年龄、性别。

ID=input(‘请输入十八位身份证号码: ‘)
if len(ID)==18:
  print("你的身份证号码是 "+ID)
else:
  print("错误的身份证号码")

ID_add=ID[0:6]
ID_birth=ID[6:10]
ID_sex=ID[14:17]

if int(ID_add)==440101:
  print("省市区:广东省广州市市辖区")
elif int(ID_add)==440102:
    print("省市区:广东省广州市东山区")
elif int(ID_add)==440103:
    print("省市区:广东省广州市荔湾区")
elif int(ID_add)==440104:
    print("省市区:广东省广州市越秀区")
elif int(ID_add)==440105:
    print("省市区:广东省广州市海珠区")

birth=2017-int(ID_birth[0:4])
print("年龄：{}".format(birth)) 

if int(ID_sex)%2==0:
  print(‘性别：女‘)
else:
  print(‘性别：男‘)

3-d 用字符串操作生成python文档各库的网址(起始网址在这里https://docs.python.org/3.6/library/index.html)

3-e 练习字符串的+,*,in,len(),eval()