实验8 python库应用编程与体验

3. 实验任务3：使用turtle库用矩形绘制花瓣

from turtle import *

def square(size=50, rgb='pink'):
    '''绘制正方形
    参数size指定边长
    参数rgb指定画笔颜色
    如果没有给参数，采用默认值
    '''
    pencolor(rgb)
    for i in range(4):
        fd(size)
        left(90)


def main():
    setup(800, 600)
    speed(0)

    n = 10
    for i in range(n):
        square(80,'orange')
        left(360/n)

    hideturtle()
    done()


if __name__ == '__main__':
    main()

 

 

 4. 实验任务4：使用turtle库用圆弧绘制花瓣

from turtle import *

setup(800, 600)
pencolor('pink')

n = 10
for i in range(n):
    # 绘制一片花瓣
    for j in range(2):
        circle(80, 90)
        left(90)

    right(360/n)

hideturtle()
done()

 

 

 5. 实验任务5：使用turtle库绘制螺旋状正方形、螺旋五边形

from turtle import *

setup(800, 600)
bgcolor('black')
pencolor('white')
speed(0)

angle = 0
size = 2
lt(60)

n = 10
for i in range(n):
    for j in range(5):
        fd(size)
        angle += 360/5
        seth(angle)
        size += 5

hideturtle()
done()

 

 

6. 实验任务6：使用turtle库绘制条状彩色颜色图谱 

from random import random
from turtle import*
setup(800,600)
speed(0)
def rect(x=10,y=50,rgb='black'):
    rgb=tuple(random() for i in range(3))
    color(rgb)
    for i in range(1,5):
        if i%2==1:
            fd(10)
        else:
            fd(50)
        lt(90)
for i in range(20):
    penup()
    goto(-100+i*10,0)
    pendown()
    begin_fill()
    rect()
    end_fill()
hideturtle()
done()