程序执行流程/布尔类型与布尔：运算猜数字游戏；库的使用：turtle

number = 18

while True:
    guess = int(input('请输入一个数字：'))
    if guess > number:
        print('>')
    elif guess < number:
        print('<')
    else:
        print('=')
        break

import turtle
>>> turtle.fillcolor('purple')
>>> turtle.begin_fill()
>>> turtle.circle(30)
>>> turtle.end_fill()
>>> turtle.up()
>>> turtle.goto(0,-50)
>>> turtle.down()
>>> turtle.circle(100)
>>> turtle.up()
>>> turtle.goto(0,-60)
>>> turtle.fillcolor('yellow')
>>> turtle.begin_fill()
>>> turtle.circle(20)
>>> turtle.down()
>>> turtle.end_fill()

import turtle
>>> turtle.circle(100)
>>> turtle.circle(90)
>>> turtle.circle(80)
>>> turtle.circle(70)
>>> turtle.circle(60)
>>> turtle.color('red')
>>> turtle.circle(50)
>>> turtle.color('yellow')
>>> turtle.circle(40)
>>> turtle.color('green')
>>> turtle.circle(30)
>>> turtle.circle(20)
>>> turtle.circle(10)
>>> turtle.circle(9)

import turtle
>>> turtle.circle(120)
>>> turtle.up()
>>> turtle.goto(0,30)
>>> turtle.down()
>>> turtle.circle(90)
>>> turtle.up()
>>> turtle.goto(0,60)
>>> turtle.down()
>>> turtle.circle(60)
>>> turtle.up()
>>> turtle.goto(0,90)
>>> turtle.down()
>>> turtle.circle(30)