[Python-ideas] namedtuple nit...

[Antoine Rozo]

Yes, but A objects have no slots, no dict, do not accept attribute
assignment, but are mutable.

>>> a = A()
>>> a
[]
>>> a.__slots__
()
>>> a.__dict__
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'A' object has no attribute '__dict__'
>>> a.append(1)
>>> a.append(2)
>>> a
[1, 2]


2017-07-28 20:23 GMT+02:00 Mike Miller <python-ideas at mgmiller.net>:

> That's a subclass.  Also:
>
> >>> class A(list): __slots__ = ()
> ...
> >>>
> >>> a = A()
> >>> a.foo = 'bar'
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> AttributeError: 'A' object has no attribute 'foo'
>
> -Mike
>
>
> On 2017-07-28 01:06, Antoine Rozo wrote:
>
>>  > If an object has no slots or dict and does not accept attribute
>> assignment, is it not effectively immutable?
>>
>> No, not necessarily.
>>
>> class A(list): __slots__ = ()
>>
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-- 
Antoine Rozo
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