來自菜鳥教程
https://www.runoob.com/python/python-exercise-example58.html
題目：畫圖赌蔑，學(xué)用rectangle畫方形钝诚。
程序分析：
rectangle(int left, int top, int right, int bottom)
參數(shù)說明：(left ，top )為矩形的左上坐標(biāo)寇僧，(right,bottom)為矩形的右下坐標(biāo)，兩者可確定一個矩形的大小
實例(Python 2.0+)
#!/usr/bin/python
# -*- coding: UTF-8 -*-
if __name__ == '__main__':
from Tkinter import *
root = Tk()
root.title('Canvas')
canvas = Canvas(root,width = 400,height = 400,bg = 'yellow')
x0 = 263
y0 = 263
y1 = 275
x1 = 275
for i in range(19):
canvas.create_rectangle(x0,y0,x1,y1)
x0 -= 5
y0 -= 5
x1 += 5
y1 += 5
canvas.pack()
root.mainloop()
現(xiàn)在是畫方形疑枯，不知道下次畫啥
