On Thu, Oct 17, 2019 at 06:07:51PM -0400, Christopher Barker wrote:
> "
> Open questions
> Should these operators be part of the ABC Mapping API?
> '
>
> Absolutely! having the built in mapping NOT be the same as the Mapping API
> seems like a really bad idea.
I'm not so sure about that, which is why it's an open question. The PEP
proposes a much more limited change: the concrete class dict to support
a merge operator + or maybe | rather than making any proposals for other
mappings and the abstract Mapping API.
The Mapping API provides:
in
equality
subscripting (getitem)
get
keys/items/values
len
iter
Notice that there is no `update` API.
Dicts currently have at least eight APIs which aren't part of the
Mapping API:
update
pop and popitem
setdefault
copy
clear
delitem and setitem
The key point of abstract base classes is that they provide the
*minimum* interface you can expect from a Mapping. This PEP does not
require all mapping types to support a merge operator.
--
Steven
_______________________________________________
Python-ideas mailing list -- python-ideas@python.org
To unsubscribe send an email to python-ideas-le...@python.org
https://mail.python.org/mailman3/lists/python-ideas.python.org/
Message archived at
https://mail.python.org/archives/list/python-ideas@python.org/message/2WMAALC2QQORDNKST6CR2XMO6QXL6TNA/
Code of Conduct: http://python.org/psf/codeofconduct/
