python练手_63-画椭圆

# -*- coding:utf-8 -*-
# @Author: CH
"""
@project: python study
@time:2019/1/7-23:55
@file_name:【程序63】画椭圆.py
@IDE:PyCharm 
@else: DO NOT STOP STUDYING!!!
"""
# 题目 画椭圆。
#
# 程序分析 使用 tkinter。
if __name__ == '__main__':
    from tkinter import *

    x = 360
    y = 160
    top = y - 30
    bottom = y - 30

    canvas = Canvas(width=400, height=600, bg='white')
    for i in range(20):
        canvas.create_oval(250 - top, 250 - bottom, 250 + top, 250 + bottom)
        top -= 5
        bottom += 5
    canvas.pack()
    mainloop()