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Make StuffDocumentsChain doc separator configurable (#3718)

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This PR makes the `"\n\n"` string with which `StuffDocumentsChain` joins
formatted documents a property so it can be configured. The new
`document_separator` property defaults to `"\n\n"` so the change is
backwards compatible.
This commit is contained in:
Robert Perrotta 2023-04-28 23:14:07 -04:00 committed by GitHub
parent 64ba24292d
commit 22770f5202
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1 changed files with 3 additions and 1 deletions
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4
langchain/chains/combine_documents/stuff.py
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@ -30,6 +30,8 @@ class StuffDocumentsChain(BaseCombineDocumentsChain):
document_variable_name: str
"""The variable name in the llm_chain to put the documents in.
If only one variable in the llm_chain, this need not be provided."""
document_separator: str = "\n\n"
"""The string with which to join the formatted documents"""
class Config:
"""Configuration for this pydantic object."""
@ -66,7 +68,7 @@ class StuffDocumentsChain(BaseCombineDocumentsChain):
for k, v in kwargs.items()
if k in self.llm_chain.prompt.input_variables
}
inputs[self.document_variable_name] = "\n\n".join(doc_strings)
inputs[self.document_variable_name] = self.document_separator.join(doc_strings)
return inputs
def prompt_length(self, docs: List[Document], **kwargs: Any) -> Optional[int]: