[Python-ideas] Json object-level serializer

[Antoine Pitrou]

On Thu, 29 Jul 2010 14:47:34 +0200
Daniel Fetchinson <fetchinson at googlemail.com>
wrote:
> > What about adding in the json package the ability for an object to
> > provide a different object to serialize ?
> > This would be useful to translate a class into a structure that can be
> > passed to json.dumps
> >
> > So, it __json__ is provided, its used for serialization instead of the
> > object itself:
> >
> >>>> import json
> >>>> class MyComplexClass(object):
> > ...     def __json__(self):
> > ...         return 'json'
> > ...
> >>>> o = MyComplexClass()
> >>>> json.dumps(o)
> > '"json"'
> 
> Have a look at turbojson [1], the jsonification package that uses
> peak.rules [2] and which comes with turbogears [3]. It does exactly
> what you propose.

That it uses PEAK-Rules is probably a good reason to avoid it.
Also, AFAIK, TurboGears have stopped using turbojson and relies on
[simple]json instead.

Regards

Antoine.