[Python-Dev] PEP 557: Data Classes
v+python at g.nevcal.com
Mon Sep 18 16:50:30 EDT 2017
On 9/18/2017 11:37 AM, Ethan Furman wrote:
> On 09/11/2017 03:28 PM, Guido van Rossum wrote:
>> Oddly I don't like the enum (flag names get too long that way), but I
>> do agree with everything else Barry said (it
>> should be a trivalue flag and please don't name it cmp).
> Hmmm, named constants are one of the motivating factors for having an
> Enum type. It's easy to keep the name a reasonable length, however:
> export them into the module-level namespace. re is an excellent
> example; the existing flags were moved into a FlagEnum, and then (for
> backwards compatibility) aliased back to the module level:
> Likewise, if we had:
> class Compare(enum.Enum):
> NONE = 'each instance is an island'
> EQUAL = 'instances can be equal to each other'
> ORDERED = 'instances can be ordered and/or equal'
> then we can still use, for example, EQUAL, but get the more
> informative repr and str when we need to.
I tend to like the Enum also. But maybe this is a case where there
should be multiple different decorators:
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