剖析一行(模糊的?)蟒蛇

我在读另一个关于堆栈溢出的问题( Zen of Python

import this
"".join([c in this.d and this.d[c] or c for c in this.s])

"The Zen of Python, by Tim Peters\n\nBeautiful is better than ugly.\nExplicit is
better than implicit.\nSimple is better than complex.\nComplex is better than 
complicated.\nFlat is better than nested.\nSparse is better than dense.
\nReadability counts.\nSpecial cases aren't special enough to break the rules.
\nAlthough practicality beats purity.\nErrors should never pass silently.
\nUnless explicitly silenced.\nIn the face of ambiguity, refuse the temptation to
guess.\nThere should be one-- and preferably only one --obvious way to do it.
\nAlthough that way may not be obvious at first unless you're Dutch.\nNow is 
better than never.\nAlthough never is often better than *right* now.\nIf the 
implementation is hard to explain, it's a bad idea.\nIf the implementation is
easy to explain, it may be a good idea.\nNamespaces are one honking great idea 
-- let's do more of those!"

所以我不得不花了一上午的时间来理解上面的清单。。。理解。。。事情。我不太愿意直截了当地声明它是模糊的,但这仅仅是因为我只编写了一个半月的程序,所以不确定这种构造在python中是否很常见。

this.s 包含上述打印输出的编码版本:

"Gur Mra bs Clguba, ol Gvz Crgref\n\nOrnhgvshy vf orggre guna htyl.\nRkcyvpvg vf orggre guna vzcyvpvg.\nFvzcyr vf orggre guna pbzcyrk.\nPbzcyrk vf orggre guna pbzcyvpngrq.\nSyng vf orggre guna arfgrq.\nFcnefr vf orggre guna qrafr.\nErnqnovyvgl pbhagf.\nFcrpvny pnfrf nera'g fcrpvny rabhtu gb oernx gur ehyrf.\nNygubhtu cenpgvpnyvgl orngf chevgl.\nReebef fubhyq arire cnff fvyragyl.\nHayrff rkcyvpvgyl fvyraprq.\nVa gur snpr bs nzovthvgl, ershfr gur grzcgngvba gb thrff.\nGurer fubhyq or bar-- naq cersrenoyl bayl bar --boivbhf jnl gb qb vg.\nNygubhtu gung jnl znl abg or boivbhf ng svefg hayrff lbh'er Qhgpu.\nAbj vf orggre guna arire.\nNygubhtu arire vf bsgra orggre guna *evtug* abj.\nVs gur vzcyrzragngvba vf uneq gb rkcynva, vg'f n onq vqrn.\nVs gur vzcyrzragngvba vf rnfl gb rkcynva, vg znl or n tbbq vqrn.\nAnzrfcnprf ner bar ubaxvat terng vqrn -- yrg'f qb zber bs gubfr!"

以及 this.d 包含一个字典和解码的密码 这个。s :

{'A': 'N', 'C': 'P', 'B': 'O', 'E': 'R', 'D': 'Q', 'G': 'T', 'F': 'S', 'I': 'V', 'H': 'U', 'K': 'X', 'J': 'W', 'M': 'Z', 'L': 'Y', 'O': 'B', 'N': 'A', 'Q': 'D', 'P': 'C', 'S': 'F', 'R': 'E', 'U': 'H', 'T': 'G', 'W': 'J', 'V': 'I', 'Y': 'L', 'X': 'K', 'Z': 'M', 'a': 'n', 'c': 'p', 'b': 'o', 'e': 'r', 'd': 'q', 'g': 't', 'f': 's', 'i': 'v', 'h': 'u', 'k': 'x', 'j': 'w', 'm': 'z', 'l': 'y', 'o': 'b', 'n': 'a', 'q': 'd', 'p': 'c', 's': 'f', 'r': 'e', 'u': 'h', 't': 'g', 'w': 'j', 'v': 'i', 'y': 'l', 'x': 'k', 'z': 'm'}

据我所知,Jaime代码中的执行流程如下:
1循环 c for c in this.s
c in this.d 计算结果为True时,“and”语句将执行其直接右边的任何内容(在本例中) this.d[c] .
c在这个。d 计算结果为False(Jaime的代码中从不发生这种情况),“or”语句执行其直接右边的任何内容,在本例中是循环 .

我说的对吗?

for 循环开始执行并赋值,但实际上只在代码执行的稍后点返回一个值,如果有的话?

另外,为了加分,禅宗档案里关于荷兰人的奇怪台词是怎么回事?

编辑: 虽然现在说这话让我感到羞耻,但直到三秒钟前我还以为吉多·范·罗森是意大利人。在阅读了他的维基百科文章之后,我至少理解了,如果不是完全理解的话,为什么会有这句话。