import json
 
class objectjson:
 
    def __init__(self, json_data):
        if isinstance(json_data, basestring):
            json_data = json.loads(json_data)
        self.json_data = json_data
 
    def __getattr__(self, key):
        if key in self.json_data:
            if isinstance(self.json_data[key], (list, dict)):
                return objectjson(self.json_data[key])
            else:
                return self.json_data[key]
        else:
            raise Exception('There is no json_data[\'{key}\'].'.format(key=key))
 
    def __repr__(self):
        out = self.__dict__
        return '%r' % (out['json_data'])
 
j = objectjson('{"test":{"a":1,"b":2,"c":3}}')
print(j, j.test, j.test.a)

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