On 2021-05-06 12:46:40, Shreyan Avigyan wrote:
> But Python doesn't have pointers and getattr, settatr can be adjusted
> to work with private members.
Not really, this is explicitly mentioned on the docs.
Here's an example:
> >>> from dataclasses import dataclass
> >>> @dataclass(frozen=True)
> ... class Example:
> ... field: str
> ...
> >>> e1 = Example('string')
> >>> e1.field
> 'string'
> >>> e1.field = 'Something'
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File "<string>", line 4, in __setattr__
> dataclasses.FrozenInstanceError: cannot assign to field 'field'
> >>> e1.__setattr__('field', 'Something')
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File "<string>", line 4, in __setattr__
> dataclasses.FrozenInstanceError: cannot assign to field 'field'
> >>> object.__setattr__(e1, 'field', 'Something')
> >>> e1.field
> 'Something'
"private" member are just a convention, always. No reflection or pointer
manipulation is necessary to change them, let alone just reading.
"@property", "getattr"/"setattr", "@cached_property" solves all problems
that Java introduces with worthless getters and setters.
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