[Python-ideas] anonymous object support

[Devin Jeanpierre]

My favorite declarative-namedtuple hack is
http://code.activestate.com/recipes/500261-named-tuples/#c16

Devin

On Sat, Aug 6, 2011 at 3:50 PM, Terry Reedy <tjreedy at udel.edu> wrote:

> On 8/6/2011 2:53 AM, Eric Snow wrote:
>
>> On Sat, Aug 6, 2011 at 12:37 AM, Carl Matthew Johnson
>> <cmjohnson.mailinglist at gmail.**com <cmjohnson.mailinglist at gmail.com>>
>>  wrote:
>>
>>> As another example, using metaclasses you can change namedtuple's syntax
>>> from the somewhat clunky
>>>
>>> Point = namedtuple('Point', 'x y')
>>>
>>> to the more elegant but confusing since it uses "class"
>>>
>>> class Point(NamedTuple):
>>>        x
>>>        y
>>>
>>
> If NamedTuple were documented as having a custom metaclass, and if this
> were a common idiom, that would not be too confusing as all.
>
>
>  You don't even need to use __prepare__() if you make it look like this:
>>
>> @as_namedtuple
>> class Point:
>>     x = ...
>>     y = ...
>>
>> Since Ellipsis became valid as a normal-use object this works.  And
>> that decorator is a snap to write.
>>
>
> This looks ok to me too. New keywords and syntax should be *very* rare and
> reserved for things that cannot be done so easily with what we have now.
>
> --
> Terry Jan Reedy
>
>
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