credentials.py 文件源码

def load(self):
        try:
            available_creds = self._ini_parser(self._creds_filename)
        except ConfigNotFound:
            return None
        if self._profile_name in available_creds:
            config = available_creds[self._profile_name]
            if self.ACCESS_KEY in config:
                logger.info("Found credentials in shared credentials file: %s",
                            self._creds_filename)
                access_key, secret_key = self._extract_creds_from_mapping(
                    config, self.ACCESS_KEY, self.SECRET_KEY)
                token = self._get_session_token(config)
                return Credentials(access_key, secret_key, token,
                                   method=self.METHOD)