On Mon, Apr 13, 2020 at 9:22 PM Neil Girdhar <mistersh...@gmail.com> wrote:
> Cool, thanks for doing the relevant research.
>
For my part, I'd like to see an aeefort to move dataclasses forward. Now
that they are in the standard library, they do need to remain pretty
stable, but there's still room for extending them. But it's a bit hard when
ideas and PRs are mingled in with everything else Python.
Maybe a gitHub repo just for dataclasses?
@Eric V. Smith <e...@trueblade.com>: what do you think? IS there a way to
keep them moving forward?
> I'm just going to swap dataclasses for actual classes whenever I need
> inheritance. It seems like a pity though.
>
For my part, I've gotten around it (for a different reason...) with an
extra inheritance dance:
@dataclass
MyClassBase:
....
MyRealClass(MyClassBase, Some_other_baseclass):
def __init__(self., args, kwargs):
dc_args, dc_kwargs = some_magic_with_self.__dataclass_fields__
MyClassBase.__init__(dc_args, dc_kwargs)
super().__init__(self, args, kwargs)
and you could put that __init__ in a mixin to re-use it.
Or, frankly, just give your dataclass some extra fields that are needed by
the superclass you want to use.
-CHB
Best,
>
> Neil
>
> On Tue, Apr 14, 2020 at 12:07 AM Christopher Barker <python...@gmail.com>
> wrote:
>
>> I feel like it would be nice to be able to use dataclasses more often
>>> without worrying that you cannot use dataclasses in cooperative
>>> inheritance. Perhaps, dataclasses could call super with unused args and
>>> kwargs?
>>>
>>
>> There is a PR on gitHub where a user has requested that dataclasses
>> (optionally) except any extra kwargs along. I think it saw some support,
>> but has stalled out. Im pretty sure in that case, the extra kwargs would be
>> ignored.
>>
>> https://github.com/python/cpython/pull/19206
>> https://bugs.python.org/issue33493
>>
>> -CHB
>>
>> On Sun, Apr 12, 2020 at 12:49 AM Neil Girdhar <mistersh...@gmail.com>
>> wrote:
>>
>>> class X:
>>> def __init__(self, x, **kwargs):
>>> super().__init__(**kwargs)
>>> print(x, kwargs)
>>>
>>>
>>>
>>> @dataclass
>>> class Y(X):
>>> y: int
>>>
>>>
>>> Y(1) # What should happen?
>>> Y(1, 2) # What should happen?
>>>
>>>
>>> I feel like it would be nice to be able to use dataclasses more often
>>> without worrying that you cannot use dataclasses in cooperative
>>> inheritance. Perhaps, dataclasses could call super with unused args and
>>> kwargs?
>>>
>>> Best,
>>>
>>> Neil
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>>
>>
>> --
>> Christopher Barker, PhD
>>
>> Python Language Consulting
>> - Teaching
>> - Scientific Software Development
>> - Desktop GUI and Web Development
>> - wxPython, numpy, scipy, Cython
>> --
>> Christopher Barker, PhD
>>
>> Python Language Consulting
>> - Teaching
>> - Scientific Software Development
>> - Desktop GUI and Web Development
>> - wxPython, numpy, scipy, Cython
>>
>
--
Christopher Barker, PhD
Python Language Consulting
- Teaching
- Scientific Software Development
- Desktop GUI and Web Development
- wxPython, numpy, scipy, Cython
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