Question

这破坏了我的大脑，我到处搜寻都无济于事。这是一个例子：

masNoun = ["Mann", "Junge"]
femNoun = ["Frau"]
neuNoun = ["Madchen", "Kind"]
masArt = ["ein"]
femArt = ["eine"]
firstProSing = ["Ich"]
seconProSing = ["du"]
thirdProSing = ["Er", "Sie"]
firstVerb = ["bin"]
seconVerb = ["bist"]
thirdVerb = ["ist"]

subject = firstProSing or seconProSing or thirdProSing
verb = firstVerb or seconVerb or thirdVerb
object1 = masArt or femArt
object2 = masNoun or femNoun

输出：输出似乎总是第一个变量。我尝试使用随机模块如下：

object1 = random.choice(masNoun or femNoun)

结果仍然相同，第一个变量是输出选项。 “或”函数似乎对我的例子不起作用。我很难过。任何帮助将不胜感激！

Answer 1

Python中的or关键字用作布尔运算符 - 如果操作数是布尔值，它将表达式计算为True或False。

在这种情况下，操作数不是布尔值，因此or运算符将返回评估为True的操作数。请记住，or运算符以short-circuit方式运行。

例如：

>>> a = 2
>>> b = 3
>>> a or b
2
>>> b or a
3

对我来说，看起来你希望变量从给定的可能值列表中取一个随机值。

在这种情况下，你想要的是这些：

import random

subjects = ['Ich', 'du', 'er', 'sie']

subject = random.choice(subjects)

编辑：根据评论，要使用多个变量列表而不是一个组合列表执行此操作，您可以执行以下操作：

import random

firstProSing = ["Ich"]
secondProSing = ["du"]
thirdProSing = ["Er", "Sie"]

subject = random.choice(firstProSing + secondProSing + thirdProSing)

+运算符将采用列表并将它们组合在一起，因此此代码相当于：

subjects = firstProSing + secondProSing + thirdProSing
# Comment: Here the content of subjects is ['Ich', 'du', 'Er', 'Sie']
subject = random.choice(subjects)

Answer 2

'或'声明不是这样的。这是一个布尔值，而不是随机选择。随机选择可以这样做：

import random

subjects = ["Ich", "du", "Er", "Sie"]
verbs = ["bin", "bist", "ist"]
objects1 = ["ein","eine"]
objects2 = ["Mann", "Junge","Frau"]

subject = random.choice(subjects)
verb = random.choice(verbs)
object1 = random.choice(objects1)
object2 = random.choice(objects2)

Answer 3

in OR clause if leftmost condition is True python will not look further

firstProSing = ["Ich"]
seconProSing = ["du"]
thirdProSing = ["Er", "Sie"]

subject = firstProSing or seconProSing or thirdProSing

print(firstProSing)

['Ich']

# here the first value is empty or False, python looks
# right and finds that seconProSing is True so its value 'du' is chosen

subject = "" or seconProSing or thirdProSing

print(subject)

['du']

你如何将变量的值随机分配给python中的另一个变量？

3 个答案: