遵循武士原则",我正在尝试在我的功能上执行此操作,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>
还有其他漂亮"的方法可以做到这一点吗?谢谢
Is there any other "beautiful" way to do this? Thanks
内联/三元 if
是表达式,而不是语句.您的尝试意味着如果 bool,返回值,否则返回 raise 表达式
的结果" - 这当然是无稽之谈,因为 raise exception
本身就是一个语句而不是表达式.
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.
没有办法以内联方式执行此操作,您也不应该这样做.明确地这样做:
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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