import json
obj = [[1,2,3],123,123.123,'abc',{'key1':(1,2,3),'key2':(4,5,6)}]
encodedjson = json.dumps(obj)
print repr(obj)
print encodedjson

[[1, 2, 3], 123, 123.123, 'abc', {'key2': (4, 5, 6), 'key1': (1, 2, 3)}]
[[1, 2, 3], 123, 123.123, "abc", {"key2": [4, 5, 6], "key1": [1, 2, 3]}]

decodejson = json.loads(encodedjson)
print type(decodejson)
print decodejson[4]['key1']
print decodejson

<type 'list'>
[1, 2, 3]
[[1, 2, 3], 123, 123.123, u'abc', {u'key2': [4, 5, 6], u'key1': [1, 2, 3]}]

data1 = {'b':789,'c':456,'a':123}
data2 = {'a':123,'b':789,'c':456}
d1 = json.dumps(data1,sort_keys=True)
d2 = json.dumps(data2)
d3 = json.dumps(data2,sort_keys=True)
print d1
print d2
print d3
print d1==d2
print d1==d3

{"a": 123, "b": 789, "c": 456}
{"a": 123, "c": 456, "b": 789}
{"a": 123, "b": 789, "c": 456}
False
True

data1 = {'b':789,'c':456,'a':123}
d1 = json.dumps(data1,sort_keys=True,indent=4)
print d1

{
 "a": 123,
 "b": 789,
 "c": 456
}

print 'DATA:', repr(data)
print 'repr(data)  :', len(repr(data))
print 'dumps(data)  :', len(json.dumps(data))
print 'dumps(data, indent=2) :', len(json.dumps(data, indent=4))
print 'dumps(data, separators):', len(json.dumps(data, separators=(',',':')))

DATA: {'a': 123, 'c': 456, 'b': 789}
repr(data)  : 30
dumps(data)  : 30
dumps(data, indent=2) : 46
dumps(data, separators): 25

data = {'b':789,'c':456,(1,2):123}
print json.dumps(data,skipkeys=True)

{"c": 456, "b": 789}

class Person(object):
 def __init__(self,name,age):
 self.name = name
 self.age = age
 def __repr__(self):
 return 'Person Object name : %s , age : %d' % (self.name,self.age)
if __name__ == '__main__':
 p = Person('Peter',22)
 print p

'''
Created on 2011-12-14
@author: Peter
'''
import Person
import json
p = Person.Person('Peter',22)
def object2dict(obj):
 #convert object to a dict
 d = {}
 d['__class__'] = obj.__class__.__name__
 d['__module__'] = obj.__module__
 d.update(obj.__dict__)
 return d
def dict2object(d):
 #convert dict to object
 if'__class__' in d:
 class_name = d.pop('__class__')
 module_name = d.pop('__module__')
 module = __import__(module_name)
 class_ = getattr(module,class_name)
 args = dict((key.encode('ascii'), value) for key, value in d.items()) #get args
 inst = class_(**args) #create new instance
 else:
 inst = d
 return inst
d = object2dict(p)
print d
#{'age': 22, '__module__': 'Person', '__class__': 'Person', 'name': 'Peter'}
o = dict2object(d)
print type(o),o
#<class 'Person.Person'> Person Object name : Peter , age : 22
dump = json.dumps(p,default=object2dict)
print dump
#{"age": 22, "__module__": "Person", "__class__": "Person", "name": "Peter"}
load = json.loads(dump,object_hook = dict2object)
print load
#Person Object name : Peter , age : 22

'''
Created on 2011-12-14
@author: Peter
'''
import Person
import json
p = Person.Person('Peter',22)
class MyEncoder(json.JSONEncoder):
 def default(self,obj):
 #convert object to a dict
 d = {}
 d['__class__'] = obj.__class__.__name__
 d['__module__'] = obj.__module__
 d.update(obj.__dict__)
 return d
class MyDecoder(json.JSONDecoder):
 def __init__(self):
 json.JSONDecoder.__init__(self,object_hook=self.dict2object)
 def dict2object(self,d):
 #convert dict to object
 if'__class__' in d:
  class_name = d.pop('__class__')
  module_name = d.pop('__module__')
  module = __import__(module_name)
  class_ = getattr(module,class_name)
  args = dict((key.encode('ascii'), value) for key, value in d.items()) #get args
  inst = class_(**args) #create new instance
 else:
  inst = d
 return inst
d = MyEncoder().encode(p)
o = MyDecoder().decode(d)
print d
print type(o), o