Python中列表的布尔值

2022-01-19 00:00:00 python list boolean

问题描述

将列表转换为布尔值的最佳方法是什么?我正在寻找类似的东西:

what is the best way to turn a list into bool value? I am looking for something like:

return eval_bool(my_list)

我有一个自定义容器,我在其中实现了 __nonzero__ 方法,该方法应该像这样工作:

I have a custom container in which I implement the __nonzero__ method which is supposed to work like this:

if self.my_list:
    return True
return False

但它足够pythonic吗?:) 无论如何,我很好奇 Python 如何解释 if 语句中列表的值,因为这段代码的工作方式不同:

But is it pythonic enough? :) Anyway, I am curious how Python interprets the value of the list in the if statement because this code works differently:

return my_list == True

J.


解决方案

随便用:

bool(my_list)

将其评估为 Python真实性"并返回一个真正的布尔值.

Which evaluates it as Python "truthiness" and returns a real Boolean.

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