import yaml

class ETL:

    config_file = './confs/main.yaml'

    def __init__(self):
        self.__dict__ = self.read_configs()

    def read_configs(self):
        with open(self.config_file, 'r') as f:
            return yaml.safe_load(f)

class Cosmic:

    def __init__(self, etl):
        self.instCosmic = 'cosmic'
        self.etl = etl

etl = ETL()
cosmic = Cosmic(etl)