小的时候大家应该都玩过万花尺，将笔尖放置万花尺内不停的转动，便可以画出一幅精致的线稿图，现在我们不用万花尺，我们通过Python也能绘制出万花尺图案。

（一）代码

#!/usr/bin/python# -*- coding: UTF-8 - *-import mathclass PTS:def __ init __(self):self.x = 0self.y = 0points = []def LineToDemo():from Tkinter import *screenx = 400screeny = 400canvas = Canvas(width = screenx,height = screeny,bg = ‘white')AspectRatio = 0.85MAXPTS = 15h = screenyw = screenxxcenter = w / 2ycenter = h / 2radius = (h - 30) / (AspectRatio * 2) - 20step = 360 / MAXPTSangle = 0.0for i in range(MAXPTS): rads = angle * math.pi / 180.0 p = PTS() p.x = xcenter + int(math.cos(rads) * radius) p.y = ycenter - int(math.sin(rads) * radius * AspectRatio) angle += step points.append(p)canvas.create_oval(xcenter - radius,ycenter - radius, xcenter + radius,ycenter + radius)for i in range(MAXPTS): for j in range(i,MAXPTS): canvas.create_line(points[i].x,points[i].y,points[j].x,points[j].y)canvas.pack()mainloop()if __name__ == '__main__':LineToDemo()

（二）实现结果

我们还可以通过修改不同的参数来实现不同的图案转化，大家可以多试试，做出多种不同的效果图。

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