[SDK][Python] NaN/Inf floats nested in a pydantic model serialize to invalid JSON (bare NaN/Infinity)
![[SDK][Python] NaN/Inf floats nested in a pydantic model serialize to invalid JSON (bare NaN/Infinity)](https://www.chat-gpts.plus/wp-content/uploads/2026/08/16048-831ee9c1-768x403.jpg)
该报错发生在 Langfuse Python SDK 序列化 pydantic 模型时,当模型内嵌的浮点数为 NaN/Inf 时,会绕过安全转换逻辑,直接输出非法的裸 NaN/Infinity JSON 令牌,导致 ingestion 服务器 JSON.parse 拒绝接收。优先检查 langfus

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