weakrefs and avoiding bad gc cycles

[Aaron Bentley]

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On 11-05-31 11:48 PM, Martin Pool wrote:
> On 1 June 2011 13:32, Robert Collins <robertc at robertcollins.net> wrote:
>> So nothing will leave cycles around indefinitely with *one* exception - __del__.
> 
> Right, which we pretty much ban: all of them give a warning that you
> should have explicitly closed the object, except, strangely,
> SmartMedium (which may be a bug.)
> 
> Possible we should even get rid of them in non-debug mode.

Yes.  No matter how __del__ is defined, it forces the GC to treat such
instances much more conservatively.  So in non-debug mode, it's best to
not even *define* it.

Aaron
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