[Python-Dev] PEP 557 Data Classes 5th posting
Eric V. Smith
eric at trueblade.com
Sun Dec 3 16:00:45 EST 2017
Me, either. So I'm going to leave it as a tuple. Unless I find something
while reviewing it tonight, I'm done.
Eric.
On 12/3/2017 3:02 PM, Guido van Rossum wrote:
> On second thought I don't care that much.
>
> On Dec 3, 2017 9:07 AM, "Eric V. Smith" <eric at trueblade.com
> <mailto:eric at trueblade.com>> wrote:
>
> On 12/3/2017 11:56 AM, Guido van Rossum wrote:
>
> Not sure I like that better. It's an open-ended sequence of
> homogeneous types. What's the advantage of a tuple? I don't want
> to blindly follow existing APIs.
>
>
> So people don't modify it, but consenting adults would say "don't do
> that". I currently return a new tuple in each call to fields(), but
> in the future I might return the same one every time (per class).
>
> I really don't care so much. The only reason I made any change was
> because the implementation was returning an OrderedDict, so I was
> changing the tests anyway. I'm happy to change it back to a list,
> based on the convention of homogeneous types being in a list.
>
> Eric.
>
>
> On Sun, Dec 3, 2017 at 6:55 AM, Eric V. Smith
> <eric at trueblade.com <mailto:eric at trueblade.com>
> <mailto:eric at trueblade.com <mailto:eric at trueblade.com>>> wrote:
>
> I've made a minor change: the return type of fields() is now a
> tuple, it was a list.
>
> Eric.
>
> On 12/2/2017 9:02 AM, Eric V. Smith wrote:
>
> I've pushed another version of PEP 557. The only
> difference is
> changing the default value of "order" to False instead
> of True.
> This matches regular classes: instances can be tested for
> equality, but are unordered.
>
> Discussion at
> https://github.com/ericvsmith/dataclasses/issues/104
> <https://github.com/ericvsmith/dataclasses/issues/104>
> <https://github.com/ericvsmith/dataclasses/issues/104
> <https://github.com/ericvsmith/dataclasses/issues/104>>
>
> It's already available at
> https://www.python.org/dev/peps/pep-0557/
> <https://www.python.org/dev/peps/pep-0557/>
> <https://www.python.org/dev/peps/pep-0557/
> <https://www.python.org/dev/peps/pep-0557/>>
>
> I've updated the implementation on PyPI to reflect this
> change:
> https://pypi.python.org/pypi/dataclasses/0.3
> <https://pypi.python.org/pypi/dataclasses/0.3>
> <https://pypi.python.org/pypi/dataclasses/0.3
> <https://pypi.python.org/pypi/dataclasses/0.3>>
>
> Eric.
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> --
> --Guido van Rossum (python.org/~guido
> <http://python.org/%7Eguido> <http://python.org/%7Eguido>)
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