Enhanced python-cjson 1.0.3 version: 1.0.3x

[Ferenczi Viktor]

Enhanced version of python-cjson 1.0.3 has been released.

It's numbered 1.0.3x, where x stands for eXtension.

The main improvement is the ability to extend the JSON encoder and decoder 
with extensions functions to serialize/unserialize objects not in the 
original JSON specification. This is achieved without sacrificing the speed 
and stability of the original implementation. Please send bug reports to 
python at cx.hu and do not contact the original author (Dan Pascu) about this 
version.

Download and more information:
http://cx.hu/python-cjson/

Example to encode/decode python date and datetime objects as JavaScript Date 
objects:
import re
import cjson
import datetime

# Encoding Date objects:
def dateEncoder(d):
    assert isinstance(d, datetime.date)
    return 'new Date(Date.UTC(%d,%d,%d))'%(d.year, d.month, d.day)

json=cjson.encode([1,datetime.date(2007,1,2),2], extension=dateEncoder)
assert json=='[1, new Date(Date.UTC(2007,1,2)), 2]'

# Decoding Date objects:
re_date=re.compile('^new\sDate\(Date\.UTC\(.*?\)\)')
def dateDecoder(json,idx):
    json=json[idx:]
    m=re_date.match(json)
    if not m: raise 'cannot parse JSON string as Date object: %s'%json[idx:]
    args=cjson.decode('[%s]'%json[18:m.end()-2])
    dt=datetime.date(*args)
    return (dt,m.end()) # must return (object, character_count) tuple

data=cjson.decode('[1, new Date(Date.UTC(2007,1,2)), 2]', 
extension=dateDecoder)
assert data==[1,datetime.date(2007,1,2),2]