Message 410923 - Python tracker

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Author	methane
Recipients	AlexWaygood, Dennis Sweeney, JelleZijlstra, gvanrossum, kj, kumaraditya, methane, rhettinger, serhiy.storchaka, sobolevn
Date	2022-01-19.04:53:13
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1642567993.17.0.270837026123.issue46399@roundup.psfhosted.org>
In-reply-to

Content
I am not happy about exposing every internal types. I prefer duck typing. Like OrderedDict, not all dict subtypes uses `dict_keys`, `dict_views`, and `dict_items`. If typeshed annotate dict.keys() returns `dict_keys`, "incompatible override" cano not be avoided. I prefer: * Keep status-quo: keys().mapping cause false positive and user need to suppress. This is not a big problem because `.mapping` is very rarely used. * Or add `.mapping` to `KeysView`, `ValuesView`, and `ItemsView`. Force every dict subclasses to implement it.

I am not happy about exposing every internal types. I prefer duck typing.

Like OrderedDict, not all dict subtypes uses `dict_keys`, `dict_views`, and `dict_items`.
If typeshed annotate dict.keys() returns `dict_keys`, "incompatible override" cano not be avoided.

I prefer:

* Keep status-quo: keys().mapping cause false positive and user need to suppress. This is not a big problem because `.mapping` is very rarely used.
* Or add `.mapping` to `KeysView`, `ValuesView`, and `ItemsView`. Force every dict subclasses to implement it.

History
Date	User	Action	Args
2022-01-19 04:53:13	methane	set	recipients: + methane, gvanrossum, rhettinger, serhiy.storchaka, JelleZijlstra, Dennis Sweeney, sobolevn, kj, kumaraditya, AlexWaygood
2022-01-19 04:53:13	methane	set	messageid: <1642567993.17.0.270837026123.issue46399@roundup.psfhosted.org>
2022-01-19 04:53:13	methane	link	issue46399 messages
2022-01-19 04:53:13	methane	create