[issue5654] Add C hook in PyDict_SetItem for debuggers

[Ezio Melotti]

Changes by Ezio Melotti <ezio.melotti at gmail.com>:


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stage:  -> needs patch
type:  -> feature request
versions: +Python 3.3 -Python 2.7

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue5654>
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