本系列一共四篇：

在python中使用base64編碼和解碼都是非常方便的，在import base64模組後直接使用encodestring()和decodestring()就可以了，先使用基於URL的改進Base64編碼的同樣方便，python已經提供了urlsafe_b64encode()urlsafe_b64decode()供使用。

下面給出python的示範程式碼：

# http://blog.csdn.net/morewindows/article/details/11922473
# By MoreWindows ( http://blog.csdn.net/MoreWindows )
# more info please visit http://www.python.org/doc//current/library/base64.html
import base64

text = "MoreWindows - http://blog.csdn.net/morewindows?viewmode=contents 
 
[email protected]#$%"

# encodestring(string) and decodestring(string)
print "------------------------------------"
print "origin text: "
print text

base64_text = base64.encodestring(text)
print "encode: "
print base64_text

print "decode: "
print base64.decodestring(base64_text)
print "------------------------------------"


# urlsafe_b64encode(string) and urlsafe_b64decode(string)
print "------------------------------------"
print "origin text: "
print text

urlsafe_base64_text = base64.urlsafe_b64encode(text)
print "url safe encode: "
print urlsafe_base64_text

print "url safe decode: "
print base64.urlsafe_b64decode(urlsafe_base64_text)
print "------------------------------------"
 

執行結果如下：

要對檔案操作該怎麼辦了，python也提供了相應的介面，示範程式碼如下：

# http://blog.csdn.net/morewindows/article/details/11922473
# By MoreWindows ( http://blog.csdn.net/MoreWindows )
# more info please visit http://www.python.org/doc//current/library/base64.html
# base64.encode(file1, file2)
f1 = open('aaa.txt', 'r')
f2 = open('bbb.txt', 'w')
base64.encode(f1, f2)
f1.close()
2.close()