在条件表达式上引发语句 [英] raise statement on a conditional expression

问题描述

遵循武士原则，我试图在我的函数上执行此操作，但似乎是错误的...

Following "Samurai principle", I'm trying to do this on my functions but seems it's wrong...

return <value> if <bool> else raise <exception>

还有其他美丽的方法吗？谢谢

Is there any other "beautiful" way to do this? Thanks

推荐答案

内联/三元如果是表达式，而不是语句。您的尝试表示如果bool，则返回值，否则返回 raise表达式的结果-当然这是无稽之谈，因为 raise例外本身是语句，而不是表达式。

Inline/ternary if is an expression, not a statement. Your attempt means "if bool, return value, else return the result of raise expression" - which is nonsense of course, because raise exception is itself a statement not an expression.

无法进行内联，您也不想这样做。明确地执行操作：

There's no way to do this inline, and you shouldn't want to. Do it explicitly:

if not bool:
    raise MyException
return value

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