#?-*-?coding:?utf-8?-*-?
#!/usr/bin/python

import?math
from?tkinter?import?*
class?PTS:
????def?__init__（self）:
????????self.x?=?0
????????self.y?=?0
points?=?[]

def?LineToDemo（）:

????screenx?=?400
????screeny?=?400
????canvas?=?Canvas（width?=?screenxheight?=?screenybg?=?‘white‘）

????AspectRatio?=?0.85
????MAXPTS?=?15
????h?=?screeny
????w?=?screenx
????xcenter?=?w?/?2
????ycenter?=?h?/?2
????radius?=?（h?-?30）?/?（AspectRatio?*?2）?-?20
????step?=?360?/?MAXPTS
????angle?=?0.0
????for?i?in?range（MAXPTS）:
????????rads?=?an