python实现微博短地址服务算法

因公司业务需要,趁周末没事胡乱搞了一下.

#coding=UTF-8

L = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"

def long2string(i):
    if i == 0:
        return 0
    result = []
    while i > 0 :
        result.insert(0,L[(i%62)])
        i /= 62
    return "".join(result)

def string2long(s):
    i = 0
    index = 0
    while index < s.__len__():
        if index > 0: i *= 62
        i += L.index((s[index]))
        index += 1
    return i