Python - 尝试除外

Question

我正在尝试理解 Python 的 try-except 结构。它看起来很复杂，因为它有可选的 finally 和 else 子句。此外，那里可能涉及return、break、continue。您可以决定命名或不命名您捕获的异常等等......

无论如何，我想我现在已经很好地理解了控制流程，但这里引用 Python 文档中的一段话，我觉得这句话有误。

The following points discuss more complex cases when an exception occurs:

If an exception occurs during execution of the try clause, the exception may be handled by an except clause. In all cases, the exception is re-raised after the finally clause has been executed.

引用自https://docs.python.org/3/tutorial/errors.html

第 8.6 点

最后一句话好像不太对。他们这是什么意思？似乎完全错误。我的测试表明，如果您捕获并处理它(当然)，则不会重新引发异常。那么...文档中的注释是什么意思？

谁能解释一下？

编辑:在我问了这个问题后，似乎有人修复了文档页面。是这样吗？

Answer 1

我刚刚查了一下，因为我也觉得这很奇怪。我认为那里的措辞非常糟糕。您是完全正确的，如果在 except block 内处理异常，则不会重新引发异常。

他们指的是未捕获此类异常的情况:

As you can see, the finally clause is executed in any event. The TypeError raised by dividing two strings is not handled by the except clause and therefore re-raised after the finally clause has been executed.

这是来自 the same example you posted , 下面几行。

所以，总结一下。文档可能应该说:

If an exception occurs during execution of the try clause, the exception may be handled by an except clause. In all cases, an exception is re-raised after the finally clause has been executed, if it has not been caught in one of the except blocks.

正如在讨论中指出的那样，这似乎是预期的措辞:

If an exception occurs during execution of the try clause, the exception may be handled by an except clause. In all other cases, an exception is re-raised after the finally clause has been executed.