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I have been experimenting with the abc module in py3k and thought
about using the register method of an ABC as a class decorator:

<code>
import abc
class MyABC(metaclass=abc.ABCMeta):
pass

@MyABC.register
class MySub():
pass
</code>

This doesn't work because the register method returns None. It would
be a fairly simple modification to have this work:

<code>
def register(cls, subclass):
"""Register a virtual subclass of an ABC."""
... etc ...
return subclass
</code>

What do people think of this behavior?

--

-Mikolai Fajer-

On Sep 27, 4:50*pm, "Mikolai Fajer" <mfa...@gmail.com> wrote:
> I have been experimenting with the abc module in py3k and thought
> about using the register method of an ABC as a class decorator:
>
> <code>
> import abc
> class MyABC(metaclass=abc.ABCMeta):
> * * pass
>
> @MyABC.register
> class MySub():
> * * pass
> </code>
>
> This doesn't work because the register method returns None. *It would
> be a fairly simple modification to have this work:
>
> <code>
> * * def register(cls, subclass):
> * * * * """Register a virtual subclass of an ABC."""
> * * * * ... etc ...
> * * * * return subclass
> </code>
>
> What do people think of this behavior?

It's probably better to just inherit from your metclass. register is
really for use with extension types that implement an interface.
>
> --
>
> * * *-Mikolai Fajer-