python获得图片base64编码实例

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import os, base64
icon = open('ya.png','rb')
iconData = icon.read()
iconData = base64.b64encode(iconData)
LIMIT = 60
liIcon = []
while True:
        sLimit = iconData[:LIMIT]
        iconData = iconData[LIMIT:]
        liIcon.append(''%s'' %sLimit)
        if len(sLimit) < LIMIT:
                break
print os.linesep.join(liIcon)

>>> import base64
>>> s = '我是字符串'
>>> a = base64.b64encode(s)
>>> print a
ztLKx9fWt/u0rg==
>>> print base64.b64decode(a)
我是字符串

python下base64编码转换：
import base64
str1='string'
str2 = base64.b64encode(tk)
str3 = base64.b64decode(str2)