config.py 文件源码

def __call__(self, filename):
        if not filename and not self._opts.default_config:
            return None

        assert(issubclass(self._opts.ConfigClass, Config))
        if filename:
            filename = os.path.expanduser(os.path.expandvars(filename))

        config = self._opts.ConfigClass(filename,
                                        **self._opts.configClassOpts(),
                                        **self._opts.configparser_opts)

        # Default config? Start with that...
        if self._opts.default_config:
            config.read_string(self._opts.default_config, source="<default>")

        # User file.
        if filename:
            config.read()
            if self._opts.init_logging_fileConfig:
                logging.config.fileConfig(config)

        return config