[Python-Dev] class name spaces inside an outer function

Ethan Furman ethan at stoneleaf.us
Sun Apr 28 18:26:41 CEST 2013

On 04/27/2013 09:20 PM, Guido van Rossum wrote:
> On Saturday, April 27, 2013, Greg Ewing wrote:
>>  class Planet(Enum):
>>      MERCURY = (3.303e+23, 2.4397e6)
>>      VENUS   = (4.869e+24, 6.0518e6)
>>      EARTH   = (5.976e+24, 6.37814e6)
>>      MARS    = (6.421e+23, 3.3972e6)
>>      JUPITER = (1.9e+27,   7.1492e7)
>>      SATURN  = (5.688e+26, 6.0268e7)
>>      URANUS  = (8.686e+25, 2.5559e7)
>>      NEPTUNE = (1.024e+26, 2.4746e7)
>>      def __init__(self, mass, radius):
>>          self.mass = mass
>>          self.radius = radius
> If you want something like this, do you really have to inherit from Enum?

To answer your question:

Somewhere in the previous threads about enums a couple people had use-cases for an enum with extra attributes.

So, while you don't /have/ to enherit from Enum, if Enum provides the basics of what you need, and you can extend it 
with the extra functionality that you need, why shouldn't you?  (Not a rhetorical question -- I'm happy to learn 
something I don't know.)


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