_document_get_date() — langchain Function Reference

Architecture documentation for the _document_get_date() function in time_weighted_retriever.py from the langchain codebase.

Function python LangChainCore Runnables called by 1

Entity Profile

LangChainCore→ Runnables→ _document_get_date() — langchain Function Reference

Dependency Diagram

graph TD
  06a8e211_07ff_e5fa_7350_c1174a255930["_document_get_date()"]
  57cc5b02_6622_339b_0806_ef06db1bc8c7["TimeWeightedVectorStoreRetriever"]
  06a8e211_07ff_e5fa_7350_c1174a255930 -->|defined in| 57cc5b02_6622_339b_0806_ef06db1bc8c7
  de9ececd_a24c_a706_c8b7_9e9cc434d9ae["_get_combined_score()"]
  de9ececd_a24c_a706_c8b7_9e9cc434d9ae -->|calls| 06a8e211_07ff_e5fa_7350_c1174a255930
  style 06a8e211_07ff_e5fa_7350_c1174a255930 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain/langchain_classic/retrievers/time_weighted_retriever.py lines 56–62

    def _document_get_date(self, field: str, document: Document) -> datetime.datetime:
        """Return the value of the date field of a document."""
        if field in document.metadata:
            if isinstance(document.metadata[field], float):
                return datetime.datetime.fromtimestamp(document.metadata[field])
            return document.metadata[field]
        return datetime.datetime.now()