coordinate_transformation/src/config.py

import yaml


class Object(dict):

    def __init__(self):

        super(Object, self).__init__()

    def __getattr__(self, key):

        return self.get(key)

    def __setattr__(self, key, value):

        if isinstance(value, dict):

            o = Object()

            o.set(value)

            self[key] = o

        else:

            self[key] = value

    def set(self, dictionary, clear=False):

        if clear:
            self.clear()

        for key, value in dictionary.items():
            self.__setattr__(key, value)


class Config(Object):
    _instance = None

    def __new__(cls, *args, **kwargs):
        if Config._instance is None:
            Config._instance = super().__new__(cls)

        return Config._instance

    def load(self, filename):
        with open(filename, 'r', encoding='utf8') as stream:
            data = yaml.load(stream, Loader=yaml.FullLoader)

            self.set(data)