[问题/Issue] 章节7.2.1：示例代码运行报错

1. 遇到问题的章节 / Affected Chapter

Chapter7.2.1

2. 问题类型 / Issue Type

代码错误 / Code Error

3. 具体问题描述 / Problem Description

示例代码中， 当provider="modelscope"， 会进入my_llm的判断分支 if provider == "modelscope" 中，直接创建了OpenAI客户端实例，并没有走父类的__init__流程。所以 _adapter 这个属性压根没有被赋过值，父类那些方法一运行就 AttributeError。

4. 问题重现材料 / Reproduction Materials

在执行到

# 打印响应
print("ModelScope Response:",response_stream)
for chunk in response_stream:
    # chunk在my_llm库中已经打印过一遍，这里只需要pass即可
    # print(chunk, end="", flush=True)
    pass

报错： 正在使用自定义的 ModelScope Provider ModelScope Response: 正在调用 your-model-name 模型... ✅ 大语言模型响应成功: ❌ 调用LLM API时发生错误: 'MyLLM' object has no attribute '_adapter' Traceback (most recent call last): File "/Users/hollies/Documents/projects/hello-agents/code/chapter7/my_main.py", line 19, in for chunk in response_stream: ^^^^^^^^^^^^^^^ File "/Users/hollies/Documents/projects/hello-agents/venv/lib/python3.14/site-packages/hello_agents/core/llm.py", line 106, in think for chunk in self._adapter.stream_invoke(messages, **kwargs): ^^^^^^^^^^^^^ AttributeError: 'MyLLM' object has no attribute '_adapter'

5. 补充信息 / Additional Information

No response

确认事项 / Verification

• 我已阅读过相关章节的文档 / I have read the relevant chapter documentation
• 我已搜索过现有的Issues,确认此问题未被报告 / I have searched existing Issues and confirmed this hasn't been reported
• 我已尝试过基本的故障排除(如重启、重新安装依赖等) / I have tried basic troubleshooting (restart, reinstall dependencies, etc.)