[Python-ideas] namedtuple nit...

[Ivan Levkivskyi]

This error message is the same for types with __slots__, and probably it is
indeed a bit too terse.

--
Ivan



On 27 July 2017 at 18:26, Chris Barker <chris.barker at noaa.gov> wrote:

> Since we are talking about namedtuple and implementation, I just noticed:
>
> In [22]: Point = namedtuple('Point', ['x', 'y'])
> In [23]: p = Point(2,3)
>
> In [24]: p.x = 5
> ------------------------------------------------------------
> ---------------
> AttributeError                            Traceback (most recent call last)
> <ipython-input-24-328d3fab3e30> in <module>()
> ----> 1 p.x = 5
> AttributeError: can't set attribute
>
> OK -- that makes sense. but then, if you try:
>
> In [25]: p.z = 5
> ------------------------------------------------------------
> ---------------
> AttributeError                            Traceback (most recent call last)
> <ipython-input-25-625ed954d865> in <module>()
> ----> 1 p.z = 5
> AttributeError: 'Point' object has no attribute 'z'
>
> I think this should be a different message -- key here is that you can't
> set a new attribute, not that one doesn't exist. Maybe:
>
> "AttributeError: can't set new attribute"
>
> -CHB
>
> --
>
> Christopher Barker, Ph.D.
> Oceanographer
>
> Emergency Response Division
> NOAA/NOS/OR&R            (206) 526-6959   voice
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>
> Chris.Barker at noaa.gov
>
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