Python 练习实例59

Python 100例 Python 100例

题目:画图,综合例子。  

程序分析:利用for循环控制100-999个数,每个数分解出个位,十位,百位。。

程序源代码:

#!/usr/bin/python
# -*- coding: UTF-8 -*-
if __name__ == '__main__':
 from Tkinter import *
 canvas = Canvas(width = 300,height = 300,bg = 'green')
 canvas.pack(expand = YES,fill = BOTH)
 x0 = 150
 y0 = 100
 canvas.create_oval(x0 - 10,y0 - 10,x0 + 10,y0 + 10)
 canvas.create_oval(x0 - 20,y0 - 20,x0 + 20,y0 + 20)
 canvas.create_oval(x0 - 50,y0 - 50,x0 + 50,y0 + 50)
 import math
 B = 0.809
 for i in range(16):
 a = 2 * math.pi / 16 * i
 x = math.ceil(x0 + 48 * math.cos(a))
 y = math.ceil(y0 + 48 * math.sin(a) * B)
 canvas.create_line(x0,y0,x,y,fill = 'red')
 canvas.create_oval(x0 - 60,y0 - 60,x0 + 60,y0 + 60)
 
 for k in range(501):
 for i in range(17):
 a = (2 * math.pi / 16) * i + (2 * math.pi / 180) * k
 x = math.ceil(x0 + 48 * math.cos(a))
 y = math.ceil(y0 + 48 + math.sin(a) * B)
 canvas.create_line(x0,y0,x,y,fill = 'red')
 for j in range(51):
 a = (2 * math.pi / 16) * i + (2* math.pi / 180) * k - 1
 x = math.ceil(x0 + 48 * math.cos(a))
 y = math.ceil(y0 + 48 * math.sin(a) * B)
 canvas.create_line(x0,y0,x,y,fill = 'red')
 mainloop()

以上实例输出结果为:

Python 100例 Python 100例

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