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Thu Jun 2 18:20:14 CEST 2005 · http://mail.python.org/pipermail/python-dev/2005-June/054067.html

On 6/2/05, Phillip J. Eby <pje at telecommunity.com> wrote:
> At 01:08 AM 6/3/2005 +1000, Nick Coghlan wrote:
> >Also, I'm wondering if it would be useful to have a 'closing' template
> >that looked like:
> >
> >    @with_template
> >    def closing(obj):
> >        try:
> >            yield obj
> >        finally:
> >            obj.close()
> 
> +1 if you make it 'if hasattr(obj,"close"): obj.close()' in the finally
> clause, so that it will still work if the type of the object changes.

But then you'd get back the bug where it would silently do nothing
when you pass it the wrong thing; wasn't that argument used against an
earlier proposal to skip calling __exit__() when it doesn't exist?

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

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[Python-Dev] PEP 343 rewrite complete