python条件语句多条件

Emerging from the sewer, Baldric found himself in the basin of a dry fountain. In its center was a marble statue of a massive fist which appeared to be composed of many entangled bodies. Employees, by how they were dressed. There were holes in various mouths and eyes that were apparently meant to be channeling water. “I’ve got a bad feeling about this,” Baldric muttered. Shaking off his fear along with the sewage, he climbed out of the fountain and proceeded across the polished granite floors of the otherwise empty, high-ceilinged room towards a particular pair of iron-reinforced doors. They were unlocked, and with a heave, he pulled one open and started down the dim rock-wall passage. It seemed to be sloping downward.

E会从下水道合并，佩饰发现自己在一个旱喷泉盆地。 在它的中心是一个大理石雕像，拳头巨大，似乎由许多纠缠的尸体组成。 员工，通过他们的衣着。 各种嘴巴和眼睛上都有Kong，显然是要引导水的。 “对此我有一种不好的感觉，”鲍德里克喃喃地说。 他摆脱了污水带来的恐惧，从喷泉中爬出，穿过原本空旷的高天花板房间的抛光花岗岩地板，朝着一对特殊的铁加固门前进。 他们被解锁了，他举起头来拉开一个，开始沿着暗淡的岩壁通道走。 它似乎向下倾斜。

1室 (Chamber 1)

After a time the passage opened up into a small, unadorned stone chamber, the first of six according to Cassandra. Two arched doorways leading out of the chamber stood in front of Baldric. Carved into the rock above the leftmost doorway was the expression 157 * 211. Above the other doorway was carved 37 * 919. On the ceiling of the chamber was the “greater than” symbol >.

过了一会儿，通道通向一个没有装饰的小石室，根据卡桑德拉的说法，这是六分之一。 从房间出来的两个拱形门口站在波德里克的面前。 157 * 211刻在最左侧门口上方的岩石上。 在另一个门口上方刻有37 * 919 。 在房间的天花板上是“大于”符号> 。

“Based on what Cassandra said, I need to take the doorway with the greater result. I’ll bet I can weave some magic to figure that out.”

“根据卡桑德拉所说的，我需要走出更好的结果。 我敢打赌，我可以编织一些魔术来解决这个问题。”

>>> 157 * 211 > 37 * 919
False

“So Door 1 is not greater than Door 2, which means that Door 2 is in fact the greater door, and so I should take Door 2. But what is this new thing I’ve produced? Is False a string?”

“因此，门1不大于门2，这意味着门2实际上是更大的门，因此我应该选择门2。但是，我生产的这件新东西是什么？ 假是字符串吗？”

“That’s right, comparisons become booleans, which can take the form of either True or False. Interesting. Anyways, these comparisons are supposed to get more difficult, and Cassandra mentioned that death and worse lurks in the incorrect passages, so I’d better see if I can weave Magic that’s a little easier to read and understand.”

“That’s right, comparisons become booleans, which can take the form of either True or False . Interesting. Anyways, these comparisons are supposed to get more difficult, and Cassandra mentioned that death and worse lurks in the incorrect passages, so I’d better see if I can weave Magic that’s a little easier to read and understand.”

>>> door1 = 157 * 211
>>> door2 = 37 * 919
>>> door1 > door2
False

“That’s more readable, but I wish I could have it just tell me which door to go down so I don’t even have to think about it…oh yeah, I forgot! That Book of Magic had a section on conditional statements.”
“That’s more readable, but I wish I could have it just tell me which door to go down so I don’t even have to think about it…oh yeah, I forgot! That Book of Magic had a section on conditional statements.”

# notice the code's structure here, how it is indented
# try using a single tab (equivalent in length to 4 spaces) as your standard indentation
if 1 > 2:
print("It's True!")
else:
print("It's False!")

It's False!

“I remember now, conditional statements use booleans to determine which branch of code gets executed. 1 is not greater than 2, so that first if branch’s condition is False. Therefore, the else branch gets executed. Let’s see if I can get them to work in the case of this little puzzle…”
“I remember now, conditional statements use booleans to determine which branch of code gets executed. 1 is not greater than 2, so that first if branch’s condition is False . Therefore, the else branch gets executed. Let’s see if I can get them to work in the case of this little puzzle…”

# note that the code is now written in 'script mode'
# and the result of the code is shown in a separate window
door1 = 157 * 211
door2 = 37 * 919
if door1 > door2:
print('Proceed through Door 1')
else:
print('Proceed through Door 2')

Proceed through Door 2

“There we go, much harder to mix up.” Baldric happily strolled through Door 2 and once again proceeded down a dimly-lit passage before arriving at a second chamber.
“There we go, much harder to mix up.” Baldric happily strolled through Door 2 and once again proceeded down a dimly-lit passage before arriving at a second chamber.

Chamber 2(Chamber 2)

In this chamber were a total of three arched doorways.
In this chamber were a total of three arched doorways.

• Above Doorway 1:     661 * 691
• Above Doorway 2:     61 * 7331
• Above Doorway 3:     41 * 83 * 131
• On the Ceiling:           == 445793

• 门口上方1：661 * 691
• 门口上方2：61 * 7331
• 门口上方3：41 * 83 * 131
• 在天花板上： == 445793

“I see there’s a third branch to our decision now with that third door. And I have to find the result that equals 445793. Shouldn’t be a problem. elif statements can be used to fill in extra branches between the initial if and ending else. The first branch with a True boolean gets executed, and the rest of the branches are then ignored. If none of the other conditions are True, then the else branch gets executed.”

“我看到现在有了第三扇门，这是我们做出决定的第三分支。 而且我必须找到等于445793的结果。这应该不是问题。 elif语句可用于填充初始if和else else之间的额外分支。 执行带有True布尔值的第一个分支，然后忽略其余的分支。 如果其他条件都不为True ，则执行else分支。”

door1 = 661 * 691
door2 = 61 * 7331
door3 = 41 * 83 * 131
# notice that = is used for variable assignment
# while == (two equals signs) is used to test for equality
if door1 == 445793:
print('Take Door 1')
elif door2 == 445793:
print('Take Door 2')
else:
print('Take Door 3')

Take Door 3

Baldric took a step towards Door 3, then stopped in thought.

Baldric向3号门迈出了一步，然后停了下来。

“Wait a second, I didn’t actually check to make sure that the calculation for Door 3 equals 445793. I just assumed it did if the other two doors weren’t equal to 445793. It’s probably a pretty safe bet, but I’d better make a little change to my Magic just to make sure I didn’t make a mistake.”

“请稍等，我实际上并没有检查以确保3号门的计算等于445793。我只是假设其他两个门不等于445793也是如此。这可能是一个相当安全的选择，但是我最好对我的魔术做些改动，以确保我没有记错。”

door1 = 661 * 691
door2 = 61 * 7331
door3 = 41 * 83 * 131
if door1 == 445793:
print('Take Door 1')
elif door2 == 445793:
print('Take Door 2')
elif door3 == 445793:
print('Take Door 3')
else:
print('Is there a mistake?')

Take Door 3

“Same result, excellent. I’m very curious about these booleans though. Are they similar to numbers? Or strings? Or lists?”

“相同的结果，非常好。 我对这些布尔值很好奇。 它们类似于数字吗？ 还是弦乐？ 还是清单？”

>>> True + True
2
>>> True + False
1
>>> False + False
0
>>> True == 1
True
>>> False == 0
True
# True and False can behave like 1 and 0, and vice versa
>>> True[0]
Traceback (most recent call last):
File "python", line 1, in <module>
TypeError: 'bool' object is not subscriptable
# they can't, however, behave like strings or lists

“So True and False are very closely related to the integers 1 and 0. Intriguing.”

“因此， True和False与整数1和0密切相关。有趣。”

3室 (Chamber 3)

Baldric soon came to a third chamber, similar to the others, though this time it had five doors, and the following jibberish text on the ceiling:

鲍德瑞克很快来到了第三个房间，与其他房间类似，尽管这次它有五个门，天花板上还贴着下面一些胡言乱语的文字：

• Doorway 1:     “laksjdflf”
• Doorway 2:     “aowiejflk”
• Doorway 3:     “wopidnsks”
• Doorway 4:     “ufkasidhu”
• Doorway 5:     “paoiwmqnk”
• Ceiling:            in “aiuhmxijfhmsioduyweniahuewiauehrnuaghfjskalfhwiaeunhsdfhksjaueyrukasenfhkdjsfhasneuinakheiuarsdgnfudhlfauneyhuiasgnfkdhuauerhnasihafsuiehnsdjfhmauefhnyuhnkausdkfhmskaldfhmaskdufkasidhufiuwoeumopasienroiaweuroiawenruiaweynroiafuioshfnouisdgbuiozfhmniozsuerynosuihnfrsdioufhosiaueyhnasduifhnsuiafbyioausenyrunsaerbuaysdbni”

• 门口1：“ laksjdflf”
• 门口2：“ aowiejflk”
• 门口3：“ wopidnsks”
• 门口4：“ ufkasidhu”
• 门口5：“ paoiwmqnk”
• 天花板： 在 “aiuhmxijfhmsioduyweniahuewiauehrnuaghfjskalfhwiaeunhsdfhksjaueyrukasenfhkdjsfhasneuinakheiuarsdgnfudhlfauneyhuiasgnfkdhuauerhnasihafsuiehnsdjfhmauefhnyuhnkausdkfhmskaldfhmaskdufkasidhufiuwoeumopasienroiaweuroiawenruiaweynroiafuioshfnouisdgbuiozfhmniozsuerynosuihnfrsdioufhosiaueyhnasduifhnsuiafbyioausenyrunsaerbuaysdbni”

“Looks like I have to determine which of the shorter strings appears in the longer one. I think I know just the trick.”

“看起来我必须确定较长的字符串中出现了哪些较短的字符串。 我想我只知道诀窍。”

text = """
aiuhmxijfhmsioduyweniahuewiauehrnuaghfjskalfhwiaeunhsdfhksjaueyrukasenfhkdjsfha
sneuinakheiuarsdgnfudhlfauneyhuiasgnfkdhuauerhnasihafsuiehnsdjfhmauefhnyuhnkaus
dkfhmskaldfhmaskdufkasidhufiuwoeumopasienroiaweuroiawenruiaweynroiafuioshfnouis
dgbuiozfhmniozsuerynosuihnfrsdioufhosiaueyhnasduifhnsuiafbyioausenyrunsaerbuays
"""
subtext1 = "laksjdflf"
subtext2 = "aowiejflk"
subtext3 = "wopidnsks"
subtext4 = "ufkasidhu"
subtext5 = "paoiwmqnk"
# in statements are simple and very useful
# they can be used to test for substrings (i.e. >>> "fire" in "fireball")
# and they can also be used to test for membership in lists (i.e. >>> 2 in [1,2,3])
if subtext1 in text:
print("Door 1")
elif subtext2 in text:
print("Door 2")
elif subtext3 in text:
print("Door 3")
elif subtext4 in text:
print("Door 4")
elif subtext5 in text:
print("Door 5")
else:
print("Was there a mistake?")

Door 4

“Door 4 it is.”

“是4号门。”

“Ah, Door 4, I never would have guessed,” said a deep, hearty voice from behind Baldric.

“啊，第4门，我从来没有想过，”鲍德瑞克身后低沉而heart畅的声音说。

Baldric spun around to see a hulking figure emerge from the shadows. A Human, tall even by Human standards. He was wrapped in a dark gray cloak, beneath which Baldric could make out white plated armor. Despite his snow-white hair and beard, the man gave the impression of a boulder, powerful and implacable. As he approached, his armor clinking, Baldric’s mind raced with what he should do. “This guy could rip me in half with his bare hands,” thought Baldric. “Maybe it’s time to try out some more Fire magic, or maybe just make a run for it, or…”

秃头转过身，看到一个笨拙的身影从阴影中浮现。 一个人，甚至达到人的标准。 他被包裹在深灰色的斗篷中，在此之下，Baldric可以辨认出白色的盔甲。 尽管他的雪白的头发和胡须，但该人给人的印象是一块大石头，有力且坚强。 当他走近时，他的盔甲叮叮当当，Baldric的思想与他应该做的事情竞争。 “这个家伙可以赤手把我撕成两半，”鲍德里克想。 “也许是时候尝试更多的Fire魔法了，或者只是尝试一下，或者……”

Baldric almost sighed with relief when he saw the man smile and offer his hand. He shook it, grimacing from the man’s iron grip.

当鲍德瑞克看到男人微笑并伸出手时，几乎松了一口气。 他摇了摇头，从那个男人的铁腕上做鬼脸。

“The name’s Bill, Bill Johnson from Maintenance. The team got a message about a leaky faucet in the HR Manager’s office, but I’ll be damned if I can find it!” he said, throwing back his head and roaring with laughter.

“名字叫Bill，来自维护部门的Bill Johnson。 团队收到了有关人事经理办公室水龙头漏水的消息，但如果发现我，我该死的！ 他说，甩开头，大笑起来。

“Maintenance? Pardon me for asking, but where are your tools?”

“保养？ 请原谅我，但您的工具在哪里？”

“Tools? I’ve got my trusty hammer right here,” said Bill, motioning behind his back. For the first time, Baldric noticed a shape resembling the head of a massive hammer bulging beneath Bill’s cloak, and a thick metal haft sticking up over his shoulder.

“工具？ 我在这里放着我可信赖的锤子。 鲍德里克（Baldric）第一次注意到它的形状类似于在比尔（Bill）的斗篷下凸出的巨大锤子的头部，以及一根厚实的金属柄在他的肩膀上伸出来。

“That’s quite the hammer Bill. I’d hate to be the leaky faucet.”

“那真是锤子比尔。 我不想成为漏水的水龙头。”

Throwing back his head in laughter once again, Bill roared, “Well said Master Dwarf, well said! I think we’re going to get along just fine. What did you say your name was?”

比尔再次大笑起来，咆哮道，“小矮人大师，说得好！ 我认为我们会相处得很好。 你叫什么名字？”

“Baldric Hightower, under-clerk of the Most Glorious Empire, may it be busy forever, ID# 61837…”

“最光荣帝国的幕僚鲍尔德里克·高塔（Baldric Hightower）可能永远忙着，ID＃61837…”

“Baldric! A fine name for a fine fellow. Well lead on Master Baldric. You seem to know what you’re about, and I assume you’re heading towards the HR Manager’s office like myself. Let’s not dawdle now, my hammer and I are eager to get this problem solved.”

“肩带！ 好人的好名字。 好在鲍德瑞克大师身上。 您似乎知道您要干什么，我想您将像我一样前往人力资源经理办公室。 现在让我们不要混为一谈，我和我的锤子都渴望解决这个问题。”

The two proceeded through Door 4.

两人穿过4号门。

4室 (Chamber 4)

The fourth chamber had nothing on the ceiling, just the following text above 4 different doorways:

第四个房间的天花板上什么也没有，只有下面四个不同的门上方的文字：

• Doorway 1:     2 > 1 and 3
• Doorway 2:     2 > 1 and 3 > 4
• Doorway 3:     2 and 3
• Doorway 4:     2 and 3 > 4

• 门道1：2：> 1 和 3
• 门口2：2> 1 和 3> 4
• 门口3：2和3
• 门口4：2和3> 4

“Gah, more accursed puzzles. Which way this time?”

“啊，更令人困惑的谜题。 这次是哪个方向？”

Baldric, thinking back to the Book of Magic, remembered that the and operator requires the expressions on both of its sides to be true for the whole thing to evaluate to true. If one or both expressions are false, then the whole thing evaluates to false.

Baldric回想《魔法书》，想起了and运算符要求它的两边的表达式都为真，以便使整个事物评估为真。 如果一个或两个表达式为假，则整个结果为假。

>>> True and True
True
>>> True and False
False
>>> False and True
False
>>> False and False
False

This was a simple enough puzzle, but he wove some Magic just to be sure of himself.

这是一个很简单的难题，但是他为了确定自己而编织了一些魔术。

if 2 > 1 and 3 < 4:
print("Door 1")
elif 2 > 1 and 3 > 4:
print("Door 2")
elif 2 < 1 and 3 < 4:
print("Door 3")
elif 2 < 1 and 3 > 4:
print("Door 4")
else:
print("Error?")

Door 1

“Looks like Door 1 this time, Bill.”

“这次看起来像1号门，比尔。”

Walking along the passageway to the fifth chamber, Baldric noticed that part of Bill’s cloak had been torn, and it appeared as if a portion of it had been burned away. From glimpses beneath the cloak, the head of Bill’s hammer seemed to be coated in a dark-reddish substance.

沿着走廊进入第五个房间，鲍德瑞克注意到比尔斗篷的一部分被撕裂了，好像它的一部分被烧掉了。 从披风下面的瞥见中，比尔的锤头似乎被暗红色的物质所包裹。

“Bill? Eh hem…Bill?”

“法案？ 哼哼……比尔？”

Bill looked at Baldric in confusion, then said, “Oh yes, excuse me, I was uhh…deep in thought. What is it, Master Baldric?”

Bill困惑地望着Baldric，然后说：“哦，对不起，我是……沉思。 是什么，鲍德瑞克大师？”

“I couldn’t help but notice that your cloak has seen better days.”

“我不禁注意到你的斗篷已经过了更好的日子。”

“Oh, this? Yes, I made the mistake of wandering through one of these doorways at random. They’ve got some nasty critters down here to take care of any trespassers. But don’t you worry, if we take a wrong turn I know just the trick to dealing with them.” Baldric decided not to inquire any further.

“哦，这吗？ 是的，我犯了一个错误，那就是随意在其中一个门口徘徊。 他们有一些讨厌的小动物在这里照顾任何侵入者。 但您不用担心，如果我们走错了路，我知道与他们打交道的诀窍。” Baldric决定不再进一步询问。

5室 (Chamber 5)

They arrived in the fifth chamber, and Baldric noticed that it was now noticeably warmer, hot even. This chamber had four doorways again, above which were the following statements:

他们到达第五个房间，而鲍德瑞克注意到现在明显更热，更热。 这个房间又有四个门口，上面有以下陈述：

• Doorway 1:     2 > 1 or 3
• Doorway 2:     2 > 1 or 3 > 4
• Doorway 3:     2 or 3
• Doorway 4:     2 or 3 > 4
• Ceiling:            not

• 门道1：2> 1 或 3
• 门口2：2> 1 或 3> 4
• 门口3：2或3
• 门口4：2或3> 4
• 天花板： 不

Baldric thought he remembered that the “or” operator required just one of its expressions to be true for the whole thing to be true. He quickly ran a test to verify this.

鲍德里克（Baldric）以为他记得，“或”运算符只要求其中一个表达式为真，就可以使整个事情成为真。 他Swift进行了测试以验证这一点。

>>> True or True
True
>>> True or False
True
>>> False or True
True
>>> False or False
False

Just as he suspected. This was similar to the previous chamber, but he also needed to take into account the not operator stated on the ceiling. “That not operator should reverse the results, and so the not needs to apply to the entire expression. If I enclose the main expression in parentheses it will get evaluated first, and then the not should appropriately reverse the truth value of that expression.”

就像他怀疑的那样。 这类似于之前的会议厅，但他还需要考虑天花板上未注明的操作员。 那个非运算符应该反转结果，因此， 不需要将其应用于整个表达式。 如果我将主表达式括在括号中，它将首先被求值，然后not将适当地反转该表达式的真值。”

if not (1 < 2 or 3 < 4):
print("Door 1")
elif not (1 < 2 or 3 > 4):
print("Door 2")
elif not (1 > 2 or 3 < 4):
print("Door 3")
elif not (1 > 2 or 3 > 4):
print("Door 4")
else:
print("Error?")

Door 4

“Door 4 this time, Bill. Bill?”

“这次是4号门，比尔。 法案？”

Bill was muttering to himself, seemingly lost in thought. “…doesn’t make sense…adding cabbage to gibberish…but if they were somehow all converted to numbers…”

比尔自言自语，似乎陷入了沉思。 “……没有道理……把白菜加到乱七八糟的东西上……但是如果它们都以某种方式全部转换成数字……”

“Bill, you all right?”

“比尔，你还好吗？”

“Huh? Oh! Yes, forgive me. Just thinking about a dream I had. Lead the way, Master Baldric. I trust we’re almost there.”

“ Hu？ 哦! 是的原谅我 只是想着我的梦想。 鲍德里克大师，带路。 我相信我们快到了。”

“I hope so, I’m sweating like an elf in a goblin cookpot.”

“我希望如此，我像一个妖精的小锅里的小精灵一样出汗。”

6室 (Chamber 6)

They arrived in the sixth and final chamber to find a cloaked and hooded figure seated behind a desk.

他们到达第六个也是最后一个房间，找到了一个坐在桌子后面的隐身连帽人物。

“Good evening gentlemen, how can I help you?” said a voice like a sword unsheathing.

“晚上好，先生，我能为您提供什么帮助？” 像剑一样的声音传出。

Bill whispered to Baldric, “Quick man, figure out which door’s the one.” Then turning back toward the hooded figure, he said, “Hi there, I’m Bill Johnson with Maintenance, and we got a report about some water leakage in the HR Manager’s office. Would you mind pointing us in the right direction?”

Bill对Baldric轻声说：“快人，找出那扇门是那扇门。” 然后回头朝那个蒙面的人物说，“你好，我是维护的比尔·约翰逊，我们得到了一份有关人力资源经理办公室漏水的报告。 您介意为我们指明正确的方向吗？”

After a moment of silently studying Baldric and Bill, the figure said, “Why certainly, the second doorway from the left is where you want to go.”

经过一会儿的默默研究Baldric和Bill之后，那个人说：“为什么可以肯定，左边第二扇门是您想去的地方。”

Despite the hooded figure’s foreboding aura, Baldric got the feeling that under its hood was a smile.

尽管戴头巾的人有先兆的光环，但鲍德瑞克仍感觉到在它的身下是微笑。

Turning his attention back to the doorways and ceiling, Baldric saw the following.

Baldric将注意力转向门口和天花板，看到了以下情况。

• Doorway 1:     99
• Doorway 2:     77
• Doorway 3:     66
• Doorway 4:     55
• Doorway 5:     33
• Ceiling:            in and a divisor of 998877665544

• 门口1：99
• 门口2：77
• 门口3：66
• 门口4：55
• 门口5：33
• 天花板： 英寸和998877665544的因数

“Hmm, which door is it this time…”

“嗯，这次是哪扇门……”

nmain = 998877665544
n1 = 99
n2 = 77
n3 = 66
n4 = 55
n5 = 33
if (str(n1) in str(nmain)) and (nmain % n1 == 0):
print("Door 1")
elif (str(n2) in str(nmain)) and (nmain % n2 == 0):
print("Door 2")
elif (str(n3) in str(nmain)) and (nmain % n3 == 0):
print("Door 3")
elif (str(n4) in str(nmain)) and (nmain % n4 == 0):
print("Door 4")
elif (str(n5) in str(nmain)) and (nmain % n5 == 0):
print("Door 5")
else:
print("No matches?")
# if this structure seems repetitive and inefficient, that's because it is
# you will see how to do this more efficiently in future chapters

Door 3

翻译自: https://www.pybloggers.com/2017/11/intro-to-python-chapter-3-conditional-statements/

python条件语句多条件