Nick Coghlan added the comment:

Two requests:

1. Lose the frame hack. With the explicit "module=__name__" API available, the 
implicit fragile magic isn't necessary and leads to Enum instances that may or 
may not support pickling depending on the implementation. Better to say "if you 
use the functional API without passing the module name, your Enum instances 
won't support pickling".

2. Mike Bayer (SQL Alchemy author) has requested the ability to derive a custom 
metaclass that turns off the Enums-with-members-are-final subclassing 
restriction (relaxing the rule that members of an enum are instances of that 
enum to "members of an enum are instances of that enum, or one of its parent 
enums", but otherwise keeping the same behaviour as the standard enums).

Barry would probably appreciate this capability, too ;)

We don't need to explicitly support this for the initial patch (besides, as I 
read the current code, you can get something like this already just by 
overriding EnumMeta._get_mixins), but we may want to revisit it as a supported 
subclassing API at some point in the future.

----------
nosy: +ncoghlan

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<http://bugs.python.org/issue17947>
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