import json


class HParams():
    def __init__(self, json_path):
        self.load(json_path)

    def save(self, json_path):
        """Saves parameters to json file"""
        with open(json_path, 'w') as f:
            json.dump(self.__dict__, f, indent=4)

    def load(self, json_path):
        """Loads parameters from json file"""
        with open(json_path) as f:
            params = json.load(f)
            self.__dict__.update(params)

    def update(self, params):
        self.__dict__.update(params)

    @property
    def dict(self):
        """Gives dict-like access to Params instance by `params.dict['learning_rate']`"""
        return self.__dict__