On Thu, Jul 29, 2010 at 1:54 PM, M.-A. Lemburg firstname.lastname@example.org wrote:
Antoine Pitrou wrote:
On Thu, 29 Jul 2010 13:35:41 +0200 Tarek Ziadé email@example.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
How about letting json use the __reduce__ protocol instead?
How would you then write a class that works with both pickle and json ?
IMO, we'd need a separate method to return a JSON version of the object, e.g. .__json__(). I'm not sure how deserialization could be handled, since JSON doesn't support arbitrary object types.
As I told Oleg, I think its OK not to have a round trip like Pickle.
The use case I have is to express a structure in Json, but loading it back can be done in a custom, explicit process.
It cannot be triggered from the json package itself since it cannot know that a given Json structure was built through a specific class.
-- Marc-Andre Lemburg eGenix.com
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