[Python-Dev] Draft PEP for time zone support.

[Ben Finney]

Terry Reedy <tjreedy at udel.edu> writes:

> On 12/12/2012 10:56 AM, Lennart Regebro wrote:
>
> >> It seems like calling get_timezone() with an unknown timezone
> >> should just throw ValueError, not necessarily some custom
> >> Exception?
> >
> > That could very well be. What are others opinions on this?
>
> ValueError. That is what it is. Nothing special here.

I think it's useful to have this raise a custom exception
UnknownTimeZoneError, subclassed from ValueError. That satisfies those
(including me!) who think it should be a ValueError, while also making
the exception more specific so it can be handled apart from other
possible ValueError causes.

In short: +1 to ‘class UnknownTimeZoneError(ValueError)’.

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Ben Finney