全局资源文件加载

一、使用 @classmethod 全局加载

import tomllib


class Config:
    _profile = None

    @classmethod
    def __load(cls):
        if cls._profile is None:
            import os
            # 根据当前配置加载文件获取 config.toml 文件的配置路径
            root_dir = os.path.dirname(os.path.abspath(__file__))
            with open(os.path.join(root_dir, "config.toml"), "rb") as fp:
                config_data = tomllib.load(fp)
                profiles = config_data.get("profiles")
                active = profiles.get("active")
                cls._profile = profiles.get(active)
        return cls._profile

    @classmethod
    def get(cls, key: str):
        if cls._profile is None:
            cls.__load()
        return cls._profile.get(key)