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This **partially** addresses https://github.com/hwchase17/langchain/issues/1524, but it's also useful for some of our use cases. This `DocstoreFn` allows to lookup a document given a function that accepts the `search` string without the need to implement a custom `Docstore`. This could be useful when: * you don't want to implement a `Docstore` just to provide a custom `search` * it's expensive to construct an `InMemoryDocstore`/dict * you retrieve documents from remote sources * you just want to reuse existing objects
13 lines
457 B
Python
13 lines
457 B
Python
from langchain.docstore.arbitrary_fn import DocstoreFn
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from langchain.schema import Document
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def test_document_found() -> None:
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# we use a dict here for simiplicity, but this could be any function
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# including a remote lookup
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dummy_dict = {"foo": Document(page_content="bar")}
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docstore = DocstoreFn(lambda x: dummy_dict[x])
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output = docstore.search("foo")
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assert isinstance(output, Document)
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assert output.page_content == "bar"
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