[Python-Dev] a Constant addition to enum

[Ethan Furman]

A question came up on stackoverflow asking about the Planet example and the need to have the constant G defined in the 
method instead of at the class level:

http://stackoverflow.com/q/17911188/208880

Since methods and descriptors are immune to enumeration my proposed solution created a Constant descriptor that could be 
used to keep class level constants at the class level.  It's not complex, only about 7 lines.  Should we have something 
like that included in the enum module?

If we do include something like that, should it be constant, or should it be more like property?  (The important 
differences from property being that class access still returns the value, not the property itself, and setting the 
class-level value changes the value but doesn't replace the property.)

--
~Ethan~