[Python-Dev] enum discussion: can someone please summarize open issues? (original) (raw)

Ethan Furman ethan at stoneleaf.us
Fri May 3 01:57:39 CEST 2013

On 05/02/2013 04:43 PM, Greg Ewing wrote:

Guido van Rossum wrote:

you should do some other check, e.g. "if x in Color:". So you don't think it's important to have an easy way to take user input that's supposed to be a Color name and either return a Color or raise a ValueError?

I don't believe that's what he said:

The name lookup is only relevant if you already know that you have a valid name of an enum in the class [...]

User input should qualify, and using getattr(EnumClass, user_input) will get you an AttributeError instead of a ValueError if user_input is not valid, but surely you don't mind that small difference. ;)

-- Ethan

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