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Marc Klingen
November 13, 2023
Support for Langchain Expression Language (LCEL)


LangChain Expression Language, or LCEL, is a declarative way to easily compose chains together. Langfuse natively supports the new expression language.
To use Langfuse, simply add the callback handler to the invoke method:
chain.invoke(input, config={"callbacks":[handler]})
See Langchain integration docs for full details.