python加密解密模块：pyDES模块，用来提供 DES、Triple-DES 的加密算法。
专题教程：
DES加密算法,DES加密解密
python des加密解密算法
例子，Python DES加密算法代码：
#!/usr/bin/env python
#
from pyDes import *
# For Python3, you'll need to use bytes, i.e.:
# data = b"Please encrypt my data"
# k = des(b"DESCRYPT", CBC, b" ", pad=None, padmode=PAD_PKCS5)
data = "Please encrypt my data"
k = des("DESCRYPT", CBC, " ", pad=None, padmode=PAD_PKCS5)
d = k.encrypt(data)
print "Encrypted: %r" % d
print "Decrypted: %r" % k.decrypt(d)
assert k.decrypt(d, padmode=PAD_PKCS5) == data