[issue18032] Optimization for set/frozenset.issubset()

[Raymond Hettinger]

Changes by Raymond Hettinger <raymond.hettinger at gmail.com>:


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title: set methods should specify whether they consume iterators "lazily" -> Optimization for set/frozenset.issubset()

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18032>
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