#!/usr/bin/env python
#-*- coding:utf-8 -*-
# Base62 tools (convert number <=> string)
# v1.0/20130109
# python 2.x/3.x supported
#
#author: Ady Liu(imxylz@gmail.com)
#github: github.com/adyliu
 
import sys
 
basedigits='0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
BASE=len(basedigits)
 
 
def decode(s):
ret,mult = 0,1
for c in reversed(s):
ret += mult*basedigits.index(c)
mult *= BASE
return ret
 
def encode(num):
if num <0: raise Exception("positive number "+num)
if num ==0: return '0'
ret=''
while num != 0:
ret = (basedigits[num%BASE])+ret
num = int(num/BASE)
return ret
 
 
if __name__ == '__main__':
if len(sys.argv) < 2:
print("Usage: base62.py <num>...")
sys.exit(1)
width = max(len(x) for x in sys.argv[1:])
for argv in sys.argv[1:]:
try:
num = int(argv)
print('%*s %s %s' % (width,argv,'ENCODE',encode(num)))
except ValueError:
print('%*s %s %s' % (width,argv,'DECODE',decode(argv)))