Method load_from_file

tutorials/02_session_and_messages.py:250–257

从 JSON 文件加载（读档）

(cls, path: str)

    @classmethod
    def load_from_file(cls, path: str) -> "Session":
        """从 JSON 文件加载（读档）"""
        with open(path, "r", encoding="utf-8") as f:
            data = json.load(f)
        session = cls(version=data["version"])
        for msg_data in data["messages"]:
            session.messages.append(cls._dict_to_message(msg_data))
        return session

    @staticmethod
    def _message_to_dict(msg: ConversationMessage) -> dict: