在Python中评估布尔元组 [英] Evaluate boolean tuple in Python

问题描述

我正试图让它评估为假.

I'm trying to get this to evaluate to false.

(False,)

当前等于true，因为我认为元组不是空的.那么如何将其提取或转换为布尔值呢?谢谢〜

It's currently equaled to true, because I think the tuple is not empty. So how might one extract or cast this to a boolean? Thanks~

推荐答案

从元组中提取元素是最简单的方法:

Extract the element from the tuple is the most simple approach:

value = (False,)[0]

Python2更为宽大，但通常来说，出于比较目的将元组视为单个值不是一个好习惯(Python3明确禁止使用它)

Python2 is more lenient, but in general it isn't good practice to treat a tuple as a single value for comparison purposes (Python3 explicetly bans it)

相反，请查看

all

和

any

用于此行为的功能.与往常一样，文档是您的朋友:

functions for this behavior. As always, the documentation is your friend:

https://docs.python.org/2/library/functions.html#all

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