Python Challenge笔记

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http://www.pythonchallenge.com/pc/def/map.html
图片中提示 K->M  O->Q  E->G
下面给了一段话 看起来是加密过了的 根据提示可以知道 每个字母后移了2位
使用string和maketrans可以解决此问题
解密出来的文字提示使用这个规律解密地址 将map解密后得到 ocr即下一关地址
http://www.pythonchallenge.com/pc/def/ocr.html

>>> import string
>>> l = string.lowercase
>>> t = string.maketrans(l, l[2:] + l[:2])
>>> m = """g fmnc wms bgblr rpylqjyrc gr zw fylb. rfyrq ufyr amknsrcpq ypc dmp. bmgle gr gl zw fylb gq
glcddgagclr ylb rfyr'q ufw rfgq rcvr gq qm jmle. sqgle qrpgle.kyicrpylq() gq pcamkkclbcb. lmu
ynnjw ml rfc spj."""
>>> print m.translate(t)
i hope you didnt translate it by hand. thats what computers are for. doing it in by hand is
inefficient and that's why this text is so long. using string.maketrans() is recommended. now
apply on the url.
>>> print "map".translate(t)
ocr