Structures

[Steven D'Aprano]

On Tue, 04 Nov 2008 00:19:16 +0000, Marc 'BlackJack' Rintsch wrote:

> On Mon, 03 Nov 2008 23:32:25 +0000, Paulo J. Matos wrote:
> 
>> What's then the reason for adding named tuples if they are not
>> mutable...???
> 
> Names are more descriptive than "magic numbers" as indices.  See for
> example the "named tuple" returned by `os.stat()`.


I have no objection to named tuples, but I've sometimes missed having an 
equivalent to the Pascal record or C struct: essentially a named mutable 
tuple. Here's a quick way to get one:

def record(**kwargs):
    """Lightweight named mutable tuple equivalent."""
    class Record(object):
        __slots__ = kwargs.keys()
    x = Record()
    for key, value in kwargs.items():
        setattr(x, key, value)
    return x


It needs more work to be a full-fledged record, e.g. __eq__ and __str__, 
but it's a start.

 
-- 
Steven