python 练习

https://www.douban.com/group/topic/70490400/上第一题：

做为 Apple Store App 独立开发者，你要搞限时促销，为你的应用生成激活码（或者优惠券），使用 Python 如何生成 200 个激活码（或者优惠券）？

一、

import random

str='abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
lista = [i for i in str]

for i in range(20):
    random.shuffle(lista)
    coupon_series = ''.join(lista)
    print coupon_series
import random, string

输出：

x6J9STPrzqU34DAvEjIQyW0c7w5XKhZRMLfdG1Ce2p8aglbtsoiVHFmkuOnYBN
Q2HNGuRrzaxecvL96oMfFO1CK8BykJSD7PUV5ZpI0iE3nltTbYAqWd4gjXmwhs
9j5zVQwbnqtX3BYNlZDHiEasJMuhUvOLfkd7oxm2RGS8ITceygKF0AW1r6Cp4P
iJwdoy7z8GnYVNBlvK0COsMLcjU94pSPmeHh5bAIEguD2TXtrW3k1R6aZfxQFq
GvR8xjswaMdXNi3ZuoymnO9UgEfkS5zArI6pq7Hl0Ph2FBtJDQ1YKVeWC4TLbc

二、

def random_series(count,len=10):
   str='abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
   series_set =[]

   for i in range(0,count):
      series = ''
      for j in range(0,len):
         series += random.choice(str)
         if series not in series_set:
            series_set.append(series)
      print series

random_series(20)
输出：
A0dxgBq4ni
dFSicjinQ4
0Xx9rYnk43
qN0iHsIEeC
rWGOz3AFyK
k4ovRcVC1m
NTGrFBbu4p