check_input_key() — langchain Function Reference

Architecture documentation for the check_input_key() function in combined.py from the langchain codebase.

Function python LangChainCore MessageInterface

Entity Profile

LangChainCore→ MessageInterface→ check_input_key() — langchain Function Reference

Dependency Diagram

graph TD
  b56e91a8_d5f7_4641_02fb_dee7ba998eee["check_input_key()"]
  e7b5b56d_2836_1021_bdd4_75c127a0aa35["CombinedMemory"]
  b56e91a8_d5f7_4641_02fb_dee7ba998eee -->|defined in| e7b5b56d_2836_1021_bdd4_75c127a0aa35
  style b56e91a8_d5f7_4641_02fb_dee7ba998eee fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain/langchain_classic/memory/combined.py lines 37–47

    def check_input_key(cls, value: list[BaseMemory]) -> list[BaseMemory]:
        """Check that if memories are of type BaseChatMemory that input keys exist."""
        for val in value:
            if isinstance(val, BaseChatMemory) and val.input_key is None:
                warnings.warn(
                    "When using CombinedMemory, "
                    "input keys should be so the input is known. "
                    f" Was not set on {val}",
                    stacklevel=5,
                )
        return value