Steven D'Aprano wrote: Another alternative is to testing for key phrases in the exception > message: > > if "too few arguments" in err.args[0]: ... > > but that's fragile and only works until the message gets changed to say > "not enough arguments". (The error message is not part of the API, so it > can change without warning.) >
We are talking here about an exception message that is generated by core Python. So there would be some warning of change, namely the review process for core Python. I agree that there is a problem to be solved here. Perhaps it is easier and better for core Python to decide to freeze certain messages, than to add a new exception type. -- Jonathan
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