circle是什么意思，3分钟教你用circle画圈

#!/usr/bin/python
# -*- coding: UTF-8 -*- 
if __name__ == '__main__': 
 from Tkinter import * 
 
 canvas = Canvas(width=800, height=600, bg='yellow') 
 canvas.pack(expand=YES, fill=BOTH) 
 k = 1
 j = 1
 for i in range(0,26): 
 canvas.create_oval(310 - k,250 - k,310 + k,250 + k, width=1)
 k += j
 j += 0.3
 
 mainloop()