[issue45671] str(CancelledError()) is empty

[lilydjwg]

lilydjwg <lilydjwg at gmail.com> added the comment:

Oh, I find that many exceptions return an empty string when created without any arguments, but most raised ones do have a descriptive error message.

Yes, if it's going to change, we'd change all of them. But now I doubt if it's worth the effort... What if we change so that if the exception were going to return an empty string, it returns the class name instead?

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<https://bugs.python.org/issue45671>
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