(I'm using standard LangServe registration without any custom unpacking logic) After examining the source code, I found that RunnableLambda has more flexible input acceptance Both RunnablePassthrough ...
- `RunnableLambda` 的作用，是把普通 Python 函数变成 Runnable 节点，方便插入到 LCEL 链中。 - 它特别适合做轻量逻辑，例如打印中间结果、字段映射、输入输出结构适配；如果逻辑已经很重 ...
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