/.のセッションクッキー値の生成

import md5

id = 1225
passwd = 'secret'
basestr = '%d::%s' % (id, md5.new(passwd).hexdigest())

hexchars = []
for char in basestr:
    hexchars.append('%25')
    hexchars.append(hex(ord(char))[2:])
print ''.join(hexchars)