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_call() — langchain Function Reference

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

Function python AgentOrchestration ClassicChains calls 3

Entity Profile

Dependency Diagram

graph TD
  193d32b1_2740_febf_5c97_eebfa1726864["_call()"]
  c827daf0_9d8e_4865_a678_af8144586d0e["FlareChain"]
  193d32b1_2740_febf_5c97_eebfa1726864 -->|defined in| c827daf0_9d8e_4865_a678_af8144586d0e
  275efbc2_764c_f1ab_5418_e3b25379ab50["_do_retrieval()"]
  193d32b1_2740_febf_5c97_eebfa1726864 -->|calls| 275efbc2_764c_f1ab_5418_e3b25379ab50
  8245ca05_0a13_88d7_9345_6e14d983a746["_extract_tokens_and_log_probs()"]
  193d32b1_2740_febf_5c97_eebfa1726864 -->|calls| 8245ca05_0a13_88d7_9345_6e14d983a746
  df7d80eb_6d6e_6bee_cb9e_b4eda380e41a["_low_confidence_spans()"]
  193d32b1_2740_febf_5c97_eebfa1726864 -->|calls| df7d80eb_6d6e_6bee_cb9e_b4eda380e41a
  style 193d32b1_2740_febf_5c97_eebfa1726864 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain/langchain_classic/chains/flare/base.py lines 198–247

    def _call(
        self,
        inputs: dict[str, Any],
        run_manager: CallbackManagerForChainRun | None = None,
    ) -> dict[str, Any]:
        _run_manager = run_manager or CallbackManagerForChainRun.get_noop_manager()

        user_input = inputs[self.input_keys[0]]

        response = ""

        for _i in range(self.max_iter):
            _run_manager.on_text(
                f"Current Response: {response}",
                color="blue",
                end="\n",
            )
            _input = {"user_input": user_input, "context": "", "response": response}
            tokens, log_probs = _extract_tokens_and_log_probs(
                self.response_chain.invoke(
                    _input,
                    {"callbacks": _run_manager.get_child()},
                ),
            )
            low_confidence_spans = _low_confidence_spans(
                tokens,
                log_probs,
                self.min_prob,
                self.min_token_gap,
                self.num_pad_tokens,
            )
            initial_response = response.strip() + " " + "".join(tokens)
            if not low_confidence_spans:
                response = initial_response
                final_response, finished = self.output_parser.parse(response)
                if finished:
                    return {self.output_keys[0]: final_response}
                continue

            marginal, finished = self._do_retrieval(
                low_confidence_spans,
                _run_manager,
                user_input,
                response,
                initial_response,
            )
            response = response.strip() + " " + marginal
            if finished:
                break
        return {self.output_keys[0]: response}

Domain

Subdomains

Defined In

Calls

Source

Frequently Asked Questions

What does _call() do?
_call() is a function in the langchain codebase, defined in libs/langchain/langchain_classic/chains/flare/base.py.
Where is _call() defined?
_call() is defined in libs/langchain/langchain_classic/chains/flare/base.py at line 198.
What does _call() call?
_call() calls 3 function(s): _do_retrieval, _extract_tokens_and_log_probs, _low_confidence_spans.

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