[issue46896] add support for watching writes to selected dictionaries

[Carl Meyer]

Carl Meyer <carl at oddbird.net> added the comment:

> have you considered watching dict keys rather than whole dicts?

Just realized that I misunderstood this suggestion; you don't mean per-key watching necessarily, you just mean _not_ notifying on dict values changes. Now I understand better how that connects to the second part of your comment! But yeah, I don't want this limitation on dict watching use cases.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue46896>
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