本文实例讲述了python以环状形式组合排列图片并输出的方法。分享给大家供大家参考。具体分析如下：
这段代码可以自定义一个空白画板，然后将指定的图片以圆环状的方式排列起来，用到了pil库，可以通过：
pip install pil 的方式安装。
具体代码如下：
代码如下:
# -*- coding: utf-8 -*-
__author__ = 'www.bitscn.com'
import math
from pil import image
def arrangeimagesincircle(masterimage, imagestoarrange):
    imgwidth, imgheight = masterimage.size
    #we want the circle to be as large as possible.
    #but the circle shouldn't extend all the way to the edge of the image.
    #if we do that, then when we paste images onto the circle, those images will partially fall over the edge.
    #so we reduce the diameter of the circle by the width/height of the widest/tallest image.
    diameter = min(
        imgwidth  - max(img.size[0] for img in imagestoarrange),
        imgheight - max(img.size[1] for img in imagestoarrange)
    )
    radius = diameter / 2
    circlecenterx = imgwidth  / 2
    circlecentery = imgheight / 2
    theta = 2*math.pi / len(imagestoarrange)
    for i in range(len(imagestoarrange)):
        curimg = imagestoarrange[i]
        angle = i * theta
        dx = int(radius * math.cos(angle))
        dy = int(radius * math.sin(angle))
        #dx and dy give the coordinates of where the center of our images would go.
        #so we must subtract half the height/width of the image to find where their top-left corners should be.
        pos = (
            circlecenterx + dx - curimg.size[0]/2,
            circlecentery + dy - curimg.size[1]/2
        )
        masterimage.paste(curimg, pos)
img = image.new(rgb, (500,500), (255,255,255))
#下面的三个图片是3个 50x50 的pngs 图片，使用了绝对路径，需要自己进行替换成你的图片路径
imagefilenames = [d:/www.bitscn.com/images/1.png, d:/www.bitscn.com/images/2.png, d:/www.bitscn.com/images/3.png] * 5
images = [image.open(filename) for filename in imagefilenames]
arrangeimagesincircle(img, images)
img.save(output.png)
希望本文所述对大家的python程序设计有所帮助。