[Python-Dev] PEP 435 -- Adding an Enum type to the Python standard library (original) (raw)
Ethan Furman ethan at stoneleaf.us
Sun Apr 28 04:29:55 CEST 2013
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On 04/27/2013 07:12 PM, Greg Ewing wrote:
Guido van Rossum wrote:
And init/new probably shouldn't be overridden. Why shouldn't init be overridden? It's the obvious way to support Java-style enum-items-with-attributes.
Overriding init is a PITA because init is also called when you do
Planet(3) # get EARTH
and init was expecting a gravitational constant and radius (or something like that).
A couple ways around that:
have the metaclass store the args somewhere special (e.g. _args), have init look like
def __init__(self, value=None), and have the body treat _args as if it were *argshave a
_initthat the metaclass calls with the args instead of init
--
Ethan
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