Load a JSON into numed tuples.

json_to_named_tuples.py

import json
from collections import namedtuple
from decimal import Decimal


def rename(v, key):
    try:
        if v.__class__.__name__ == 'Main':
            name = key.replace('_', ' ').capitalize().replace(' ', '')
            NewClass = namedtuple(name, v._fields)
            return NewClass(**(v._asdict()))
    except AttributeError:
        pass
    return v


def fx(l):
    keys = [x[0] for x in l]
    LocalClass = namedtuple('Main', keys)
    vals = [rename(x[1], keys[i]) for i, x in enumerate(l)]
    return LocalClass(*vals)


s = '{"a":"data","b":"datab", "c":{"a":1.2}, "error":{"di":"data"}}'

ret = json.loads(s, object_pairs_hook=fx, parse_float=Decimal)
print ret

# output
# Main(a=u'data', b=u'datab', c=C(a=Decimal('1.2')), error=Error(di=u'data'))