turtle与pillow生成半透明效果的图形

"""
   turtle与pillow生成半透明效果的图形
"""
import turtle
from PIL import Image,ImageDraw,ImageTk

def make_circle_image(diameter=200,color=(255,0,0,127)):
    """生成圆形图"""
    im = Image.new("RGBA",(diameter,diameter))
    draw = ImageDraw.Draw(im)
    draw.ellipse((0,0,diameter ,diameter),fill=color)
    return im

redim = make_circle_image()
greenim = make_circle_image(color=(0,127,0,127))
blueim = make_circle_image(color=(0,0,127,127))

turtle.penup()
screen = turtle.getscreen()
screen.setup(480,360)
screen.bgpic('c:/bgsnow.png')
screen.title('turtle与pillow生成半透明效果的图形by李兴球')

redcircle = turtle.Shape('image',ImageTk.PhotoImage(redim)) 
screen.register_shape('redcircle',redcircle)

greencircle = turtle.Shape('image',ImageTk.PhotoImage(greenim)) 
screen.register_shape('greencircle',greencircle)

bluecircle = turtle.Shape('image',ImageTk.PhotoImage(blueim))

screen.register_shape('bluecircle',bluecircle)
turtle.fd(-50)
turtle.shape('redcircle')
turtle.stamp()
turtle.fd(50)
turtle.shape('greencircle')
turtle.stamp()
turtle.fd(50)
turtle.shape('bluecircle')
turtle.stamp()
turtle.ht()