[Python-Dev] bpo-36829: Add sys.unraisablehook() (original) (raw)

Victor Stinner vstinner at redhat.com
Thu May 16 14:38:17 EDT 2019

While I’m fine with the API you propose, you could consider keyword-only arguments to help future proof the call signature. I don’t like it as much because it’s not as backward compatibility proof, but it’s an option to perhaps consider.

Let's say that we have: hook(*, exc_type, exc_value, exc_tb, obj). Now we pass a new err_msg keyword argument: the call fails with a TypeError :-(

Or do you mean using **kwargs? I don't think **kwargs is a good API :-( Well, the same can be done using *args and positional arguments to ignore new unknown arguments, but I also dislike such API.

Victor

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