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base.py — langchain Source File

Architecture documentation for base.py, a python file in the langchain codebase. 19 imports, 0 dependents.

File python CoreAbstractions RunnableInterface 19 imports 2 classes

Entity Profile

Dependency Diagram

graph LR
  fdc86f9f_85df_84cf_83a4_a9e587fe40ec["base.py"]
  614e7b9f_ed51_0780_749c_ff40b74963fc["inspect"]
  fdc86f9f_85df_84cf_83a4_a9e587fe40ec --> 614e7b9f_ed51_0780_749c_ff40b74963fc
  67ec3255_645e_8b6e_1eff_1eb3c648ed95["re"]
  fdc86f9f_85df_84cf_83a4_a9e587fe40ec --> 67ec3255_645e_8b6e_1eff_1eb3c648ed95
  cccbe73e_4644_7211_4d55_e8fb133a8014["abc"]
  fdc86f9f_85df_84cf_83a4_a9e587fe40ec --> cccbe73e_4644_7211_4d55_e8fb133a8014
  8e2034b7_ceb8_963f_29fc_2ea6b50ef9b3["typing"]
  fdc86f9f_85df_84cf_83a4_a9e587fe40ec --> 8e2034b7_ceb8_963f_29fc_2ea6b50ef9b3
  b19a8b7e_fbee_95b1_65b8_509a1ed3cad7["langchain_core._api"]
  fdc86f9f_85df_84cf_83a4_a9e587fe40ec --> b19a8b7e_fbee_95b1_65b8_509a1ed3cad7
  f3bc7443_c889_119d_0744_aacc3620d8d2["langchain_core.callbacks"]
  fdc86f9f_85df_84cf_83a4_a9e587fe40ec --> f3bc7443_c889_119d_0744_aacc3620d8d2
  c554676d_b731_47b2_a98f_c1c2d537c0aa["langchain_core.documents"]
  fdc86f9f_85df_84cf_83a4_a9e587fe40ec --> c554676d_b731_47b2_a98f_c1c2d537c0aa
  ba43b74d_3099_7e1c_aac3_cf594720469e["langchain_core.language_models"]
  fdc86f9f_85df_84cf_83a4_a9e587fe40ec --> ba43b74d_3099_7e1c_aac3_cf594720469e
  e6b4f61e_7b98_6666_3641_26b069517d4a["langchain_core.prompts"]
  fdc86f9f_85df_84cf_83a4_a9e587fe40ec --> e6b4f61e_7b98_6666_3641_26b069517d4a
  6e58aaea_f08e_c099_3cc7_f9567bfb1ae7["pydantic"]
  fdc86f9f_85df_84cf_83a4_a9e587fe40ec --> 6e58aaea_f08e_c099_3cc7_f9567bfb1ae7
  91721f45_4909_e489_8c1f_084f8bd87145["typing_extensions"]
  fdc86f9f_85df_84cf_83a4_a9e587fe40ec --> 91721f45_4909_e489_8c1f_084f8bd87145
  9b4ec80f_d8de_a6e0_4f16_67ba56685088["langchain_classic.chains"]
  fdc86f9f_85df_84cf_83a4_a9e587fe40ec --> 9b4ec80f_d8de_a6e0_4f16_67ba56685088
  01158a5b_b299_f45d_92e9_2a7433a1a91a["langchain_classic.chains.base"]
  fdc86f9f_85df_84cf_83a4_a9e587fe40ec --> 01158a5b_b299_f45d_92e9_2a7433a1a91a
  a0d4f6c3_2d96_364c_720a_e778ffd171a0["langchain_classic.chains.combine_documents.base"]
  fdc86f9f_85df_84cf_83a4_a9e587fe40ec --> a0d4f6c3_2d96_364c_720a_e778ffd171a0
  style fdc86f9f_85df_84cf_83a4_a9e587fe40ec fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

"""Question answering with sources over documents."""

from __future__ import annotations

import inspect
import re
from abc import ABC, abstractmethod
from typing import Any

from langchain_core._api import deprecated
from langchain_core.callbacks import (
    AsyncCallbackManagerForChainRun,
    CallbackManagerForChainRun,
)
from langchain_core.documents import Document
from langchain_core.language_models import BaseLanguageModel
from langchain_core.prompts import BasePromptTemplate
from pydantic import ConfigDict, model_validator
from typing_extensions import override

from langchain_classic.chains import ReduceDocumentsChain
from langchain_classic.chains.base import Chain
from langchain_classic.chains.combine_documents.base import BaseCombineDocumentsChain
from langchain_classic.chains.combine_documents.map_reduce import (
    MapReduceDocumentsChain,
)
from langchain_classic.chains.combine_documents.stuff import StuffDocumentsChain
from langchain_classic.chains.llm import LLMChain
from langchain_classic.chains.qa_with_sources.loading import load_qa_with_sources_chain
from langchain_classic.chains.qa_with_sources.map_reduce_prompt import (
    COMBINE_PROMPT,
    EXAMPLE_PROMPT,
    QUESTION_PROMPT,
)


@deprecated(
    since="0.2.13",
    removal="1.0",
    message=(
        "This class is deprecated. Refer to this guide on retrieval and question "
        "answering with sources: "
        "https://python.langchain.com/docs/how_to/qa_sources/"
    ),
)
class BaseQAWithSourcesChain(Chain, ABC):
    """Question answering chain with sources over documents."""

    combine_documents_chain: BaseCombineDocumentsChain
    """Chain to use to combine documents."""
    question_key: str = "question"
    input_docs_key: str = "docs"
    answer_key: str = "answer"
    sources_answer_key: str = "sources"
    return_source_documents: bool = False
    """Return the source documents."""

    @classmethod
    def from_llm(
        cls,
// ... (200 more lines)

Domain

Subdomains

Classes

Dependencies

  • abc
  • inspect
  • langchain_classic.chains
  • langchain_classic.chains.base
  • langchain_classic.chains.combine_documents.base
  • langchain_classic.chains.combine_documents.map_reduce
  • langchain_classic.chains.combine_documents.stuff
  • langchain_classic.chains.llm
  • langchain_classic.chains.qa_with_sources.loading
  • langchain_classic.chains.qa_with_sources.map_reduce_prompt
  • langchain_core._api
  • langchain_core.callbacks
  • langchain_core.documents
  • langchain_core.language_models
  • langchain_core.prompts
  • pydantic
  • re
  • typing
  • typing_extensions

Source

Frequently Asked Questions

What does base.py do?
base.py is a source file in the langchain codebase, written in python. It belongs to the CoreAbstractions domain, RunnableInterface subdomain.
What does base.py depend on?
base.py imports 19 module(s): abc, inspect, langchain_classic.chains, langchain_classic.chains.base, langchain_classic.chains.combine_documents.base, langchain_classic.chains.combine_documents.map_reduce, langchain_classic.chains.combine_documents.stuff, langchain_classic.chains.llm, and 11 more.
Where is base.py in the architecture?
base.py is located at libs/langchain/langchain_classic/chains/qa_with_sources/base.py (domain: CoreAbstractions, subdomain: RunnableInterface, directory: libs/langchain/langchain_classic/chains/qa_with_sources).

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