条件、循环、函数定义、字符串操作练习

from turtle import *
color(‘yellow‘,‘yellow‘)
begin_fill()
while True:
    forward(100)
    right(144)
    if abs(pos())<1:
        break
end_fill()

import turtle

for i in range(2,10):
    turtle.up()
    turtle.goto(0,-20*i)
    turtle.down()
    turtle.circle(20*i)
    

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

from turtle import *
setup(600,400)
bgcolor(‘red‘)
color(‘yellow‘)

def h_draw(r):
    begin_fill()
    for i in range(5):
        forward(r)
        right(144)
    end_fill()


def h_goto(x,y,z):
    up()
    goto(x,y)
    setheading(z)
    down()

h_goto(-260,120,0)
h_draw(120)


h_goto(-110,160,40)
h_draw(40)


h_goto(-65,125,10)
h_draw(40)


h_goto(-55,55,40)
h_draw(40)


h_goto(-110,15,20)
h_draw(40)

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

turtle.begin_fill()

def h_draw(t):
    t.fd(80)
    t.right(45)
    t.fd(80)
    t.right(135)

for i in range(36):
    h_draw(turtle)
    h_draw(turtle)
    turtle.left(10)

turtle.end_fill()


turtle.right(90)
turtle.pensize(5)
turtle.color(‘green‘)
turtle.forward(300)

a=input(‘请输入你的学号：‘)
print(‘你的年级是{}级‘.format(a[2:4]))
print(‘你的专业序号是{}‘.format(a[8:10]))
print(‘你的班级学号是{}‘.format(a[10:]))

s=‘星期一星期二星期三星期四星期五星期六星期日‘
a=int(input(‘输入数字(1-7):‘))
print(s[0+3*(a-1):3+3*(a-1)])