_call() — langchain Function Reference

Architecture documentation for the _call() function in test_eval_chain.py from the langchain codebase.

Function python LangChainCore Runnables

Entity Profile

LangChainCore→ Runnables→ _call() — langchain Function Reference

Dependency Diagram

graph TD
  1f5b87f2_3a5c_ad37_a5fd_1a4aa2aab482["_call()"]
  b0bd79d7_7c19_7abd_ea39_9fe2eaf38839["_FakeTrajectoryChatModel"]
  1f5b87f2_3a5c_ad37_a5fd_1a4aa2aab482 -->|defined in| b0bd79d7_7c19_7abd_ea39_9fe2eaf38839
  style 1f5b87f2_3a5c_ad37_a5fd_1a4aa2aab482 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain/tests/unit_tests/evaluation/agents/test_eval_chain.py lines 48–60

    def _call(
        self,
        messages: list[BaseMessage],
        stop: list[str] | None = None,
        run_manager: CallbackManagerForLLMRun | None = None,
        **kwargs: Any,
    ) -> str:
        if self.sequential_responses:
            response = self.queries[list(self.queries.keys())[self.response_index]]
            self.response_index = self.response_index + 1
            return response
        prompt = messages[0].content
        return self.queries[prompt]