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Thu Nov 1 18:35:31 CET 2007 · https://mail.python.org/pipermail/python-dev/2007-November/075090.html

On 11/1/07, glyph at divmod.com <glyph at divmod.com> wrote:
> This is a minor nit, as with all decorators that take an argument, it
> seems like it sets up a hard-to-debug error condition if you were to
> accidentally forget it:
>
>     @property
>     def foo(): ...
>     @property.set
>     def foo(): ...
>
> would leave you with 'foo' pointing at something that wasn't a
> descriptor at all.  Is there a way to make that more debuggable?

Yes, if you remember my initial post, it contained this line:

   assert isinstance(prop, property)

And even without that, accessing prop.fget would fail immediately; so
instead of a non-functioning property, you get an exception at class
definition time.

-- 
--Guido van Rossum (home page: http://www.python.org/~guido/)

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[Python-Dev] Declaring setters with getters