【Python Challenge-1】trans

K --> M

O --> Q 

E --> G

所有ASCII码都加2，Y,Z回头。

推荐用string.maketrans()，所以就用呗- -、

def decode(text):    trans = string.maketrans('abcdefghijklmnopqrstuvwxyz', 'cdefghijklmnopqrstuvwxyzab')    text = text.translate(trans)    return text

先对

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.

用一次decode得到：

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.

再对'map'用一次decode得到‘ocr’