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[Python-Dev] One-line abstractmethod function?

Alexander Belopolsky alexander.belopolsky at gmail.com
Thu Dec 5 19:56:25 CET 2013 
On Thu, Dec 5, 2013 at 1:24 PM, Guido van Rossum <guido at python.org> wrote:

> How would you get the docstrings in? It seems cramming that much on a
> single line doesn't help readability (even though I agree there is a
> fair amount of boilerplace).
>

One way to reduce the amount of boilerplate code is to make abstractmethod
to supply raise NotImplementedError body when none is given.  Then you can
write

class Foo:
    @abc.abstractmethod
    def do_bar(self):
         """perform bar"""


instead of

class Foo:
    @abc.abstractmethod
    def do_bar(self):
         """perform bar"""
         raise NotImplementedError

The docstring will be required when skipping the body which is probably a
good thing.
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