Antoine Pitrou bbe2f60b3c Issue #14159: Fix the len() of weak containers (WeakSet, WeakKeyDictionary, WeakValueDictionary) to return a better approximation when some objects are dead or dying. ...

Moreover, the implementation is now O(1) rather than O(n).
Thanks to Yury Selivanov for reporting.

2012-03-01 16:26:35 +01:00

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