from collections import OrderedDict # required for maintaining order data
import json

class AppConfig:
    def __init__(self, configFile = False):
        self.configFile = False
        self.get        = False
        if configFile:
            self.configFile = configFile
            self.configLoad()

    def configLoad(self):
        try:
            with open(self.configFile) as data:
                obj      = json.load(
                                     data, 
                                     object_pairs_hook = OrderedDict # maintaining order data
                                     )
                self.get = obj
                return True
        except Exception: 
            return False

    def configSave(self, obj = False):
        obj = obj or self.get
        try:
            with open(self.configFile, "w") as outfile:
                json.dump(
                          obj,
                          outfile,
                          ensure_ascii = False, # Keep special characters
                          indent = 4
                          )
                return True
        except Exception: 
            return False


''' content of *.json
{
    "string": "ok",
    "bool": true,
    "object": {
        "int": 3,
        "float": 3.3
    }
}
'''

'''
    Application example
'''
AppConfig = AppConfig()
AppConfig.configFile = '/home/user/App/config.json' # absolute path to *.json
AppConfig.configLoad()

print AppConfig.get['string']

AppConfig.get['object']['int'] = 4
if AppConfig.configSave():
    print 'New value has been saved'