关于block change tracking

#!/usr/bin/env python
# coding:utf-8
# 双色球机选脚本
# Copyright(C) 2008 http://sunniny.iteye.com 
from random import sample, choice

N = 5
red = range(1, 33) #红球
blue = range(1, 16) #蓝球

lots = []
for x in range(N):
lots.append(sorted(sample(red, 6)) + [choice(blue)])

for n, l in enumerate(lots):
i = 1
print "%c:" % chr(65+n),
for x in l:
if i == 7:
print "-%02d" % x,
else:
print "%02d" % x,
i += 1
print

 
输出样例：
A: 06 14 15 18 20 27 -02

B: 06 09 18 19 21 32 -07

C: 06 10 18 20 24 31 -12

D: 01 12 15 20 23 25 -10

E: 02 03 07 08 11 29 -03

下次就用自己的脚本来选号了，哈哈...偶的500万