[Python-Dev] PEP 435 -- Adding an Enum type to the Python standard library

Glenn Linderman v+python at g.nevcal.com
Sat Apr 27 04:29:44 CEST 2013

On 4/26/2013 6:22 PM, Greg Ewing wrote:
> Guido van Rossum wrote:
>> If we had access to the syntax used for the definition, this would be
>> simple: assignments define items, def statements define methods. But
>> at run time we only see the final object resulting from the
>> definition,
> Another way we could tell the difference is if the def
> statement used a different protocol for making bindings
> than assignment.
> Suppose a def statement used in a class body called
> __defitem__, if it exists, instead of __setitem__. Then
> the metaclass would be able to do different things for
> defs and assignments. 

Well, some assignments could be for non-enumeration items, once you 
start allowing EnumItem in the list.  Some method of grouping 
enumeration items, or grouping non-enumeration items would solve the 

class Color( Enum ):
      # other methods and assignments
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