[Python-Dev] PEP 557: Data Classes
python-ideas at mgmiller.net
Fri Sep 8 18:17:29 EDT 2017
On 2017-09-08 07:57, Eric V. Smith wrote:
> I've written a PEP for…
Apologies for the following list dumb questions and bikesheds:
- 'Classes can be thought of as "mutable namedtuples with defaults".'
- A C/C++ (struct)ure sounds like a simpler description that many more
- dataclass name:
- class, redundant
- data, good but very common
- struct, used?
- Record? (best I could come up with)
- Source needs blanks between functions, hard to read.
- Are types required?
Maybe an example or two with Any?
- Intro discounts inheritance and metaclasses as "potentially interfering",
but unclear why that would be the case.
Inheritance is easy to override, metaclasses not sure?
- Perhaps mention ORMs/metaclass approach, as prior art:
- Perhaps mention Kivy Properties, as prior art:
- For mutable default values:
x: list # = field(default_factory=list)
Could it detect list as a mutable class "type" and set it as a factory
The PEP/bug #3 mentions using copy, but that's not exactly what I'm asking
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