[Python-Dev] PEP 435 - reference implementation discussion (original) (raw)

Ethan Furman ethan at stoneleaf.us
Sun May 5 07:59:38 CEST 2013

On 05/04/2013 08:50 PM, Tim Delaney wrote:

Think I've come up with a system that works for my auto-numbering case without knowing the internals of enumtype. Patch passes all existing test cases. The patch does two things: 1. Finds the first non-Enum class on the MRO of the new class and uses that as the enum type.

This is good. :)

2. Instead of directly setting the name and value of the enumitem, it lets the Enum class do it via Enum.init(). Subclasses can override this. This gives Enums a 2-phase construction just like other classes.

Not sure I care for this. Enums are, at least in theory, immutable objects, and immutable objects don't call init.

Of course, practicality beats purity... I'll have to think about this some more.

Fortunately, none of this has any bearing on the PEP itself.

-- Ethan

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