I need that sanity check saying at some point, you have to stop.
在一些地方需要做那样的合法性检查,告诉你必须停止操作。
It caught the error, because it checked the types of the operands before it applied things and it says, I'm going to stop.
它捕捉到了错误,因为它在,进行运算之前检查了运算对象的类型,然后Python意识到,应该停止了。
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