[issue40889] Symmetric difference on dict_views is inefficient

[Inada Naoki]

Change by Inada Naoki <songofacandy at gmail.com>:


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nosy:  -inada.naoki
resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40889>
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