On 2023-08-31 21:32:04 +0100, Chris Green via Python-list wrote:
> What sort of exception should a class raise in __init__() when it
> can't find an appropriate set of data for the parameter passed in to
> the class instantiation?
>
> E.g. I have a database with some names and address in and have a
> class Person that gets all the details for a person given their
> name.
>
> ....
> ....
> person.Person('Fred')
> ...
> ...
>
>
> If Fred doesn't exist in the database what sort of exception should
> there be? Is it maybe a ValueError?
It you are going for a builtin exception, I think KeyError is the most
appropriate: It should be a LookupError, since the lookup failed and a
database is more like a mapping than a sequence.
But it would probably be best to define your own exception for that.
hp
--
_ | Peter J. Holzer | Story must make more sense than reality.
|_|_) | |
| | | h...@hjp.at | -- Charles Stross, "Creative writing
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