function from_data in json.py shoud handle class serializable

[eggqq007]

We consider to consume function from_data in json.py to print prettify json. But I found it doesn't accept 'default' which just like default in json.dumps. It means it may hit issue while converting class into json.

json.dump(obj, fp, *, skipkeys=False, ensure_ascii=True, check_circular=True, allow_nan=True, cls=None, indent=None, separators=None, default=None, sort_keys=False, **kw)

If specified, default should be a function that gets called for objects that can’t otherwise be serialized. It should return a JSON encodable version of the object or raise a TypeError. If not specified, TypeError is raised.

[skshetry]

Support for default was added in #1547.

[eggqq007]

Support for default was added in #1547.

Thanks for working on it