[issue12128] Allow `abc.abstractproperty` to be overridden by a data attribute

[Ram Rachum]

New submission from Ram Rachum <cool-rr at cool-rr.com>:

When you create an `abc.abstractproperty` on a class, any subclass must override it as an actual property in order to be instantiable. But sometimes you want to override it with a data attribute instead, i.e. `self.x = 5` instead of `x = property(...)`. It would be nice if doing `self.x = 5` would satisfy `abc.abstractproperty` and allow the subclass to be instantiable.

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components: Library (Lib)
messages: 136388
nosy: cool-RR
priority: normal
severity: normal
status: open
title: Allow `abc.abstractproperty` to be overridden by a data attribute
type: feature request
versions: Python 3.3, Python 3.4

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12128>
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