[Python-Dev] Why does IOBase.__del__ call .close?

[Nick Coghlan]

On 11 Jun 2014 12:31, "Antoine Pitrou" <antoine at python.org> wrote:
>
> Le 10/06/2014 21:30, Nikolaus Rath a écrit :
>
>>
>> For me, having __del__ call close() does not qualify as a reasonable
>> default implementation unless close() is required to be idempotent
>> (which one could deduce from the documentation if one tries to, but it's
>> far from clear).
>
>
> close() should indeed be idempotent on all bundled IO class
implementations (otherwise it's a bug), and so should it preferably on
third-party IO class implementations.
>
> If you want to improve the documentation on this, you're welcome to
provide a patch!

We certainly assume idempotent close() behaviour in various places, so if
that expectation isn't currently clear in the docs, suggestions for
improved wording would definitely be appreciated!

Cheers,
Nick.
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