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__init__.py — langchain Source File

Architecture documentation for __init__.py, a python file in the langchain codebase. 13 imports, 0 dependents.

File python LangChainCore MessageInterface 13 imports 3 functions

Entity Profile

Dependency Diagram

graph LR
  74c9c18b_11c5_b8f7_0fac_e554bc0a732b["__init__.py"]
  f3365e3c_fb7a_bb9a_bc79_059b06cb7024["warnings"]
  74c9c18b_11c5_b8f7_0fac_e554bc0a732b --> f3365e3c_fb7a_bb9a_bc79_059b06cb7024
  3b5ab66f_4fcb_ca7c_bc35_2244b5f521fc["importlib"]
  74c9c18b_11c5_b8f7_0fac_e554bc0a732b --> 3b5ab66f_4fcb_ca7c_bc35_2244b5f521fc
  feec1ec4_6917_867b_d228_b134d0ff8099["typing"]
  74c9c18b_11c5_b8f7_0fac_e554bc0a732b --> feec1ec4_6917_867b_d228_b134d0ff8099
  b869b9c1_fb7a_fbc5_c529_98b32cb76f64["langchain_core._api.deprecation"]
  74c9c18b_11c5_b8f7_0fac_e554bc0a732b --> b869b9c1_fb7a_fbc5_c529_98b32cb76f64
  064a3e08_287a_0c59_7629_2417af02571b["langchain_classic._api.interactive_env"]
  74c9c18b_11c5_b8f7_0fac_e554bc0a732b --> 064a3e08_287a_0c59_7629_2417af02571b
  138c8655_8752_7665_c90c_fe40e072df42["langchain_classic.agents"]
  74c9c18b_11c5_b8f7_0fac_e554bc0a732b --> 138c8655_8752_7665_c90c_fe40e072df42
  b3ba1570_8ee5_0263_3e06_a05d8e20d456["langchain_classic.chains"]
  74c9c18b_11c5_b8f7_0fac_e554bc0a732b --> b3ba1570_8ee5_0263_3e06_a05d8e20d456
  68a3bb7d_2735_287c_2742_fc2f8d9faa9e["langchain_community.docstore"]
  74c9c18b_11c5_b8f7_0fac_e554bc0a732b --> 68a3bb7d_2735_287c_2742_fc2f8d9faa9e
  843eba8a_f331_d3ef_f9ba_261ed9032f2a["langchain_community.llms"]
  74c9c18b_11c5_b8f7_0fac_e554bc0a732b --> 843eba8a_f331_d3ef_f9ba_261ed9032f2a
  a2d69431_050d_f277_d355_f52831dcab75["langchain_community.llms.huggingface_pipeline"]
  74c9c18b_11c5_b8f7_0fac_e554bc0a732b --> a2d69431_050d_f277_d355_f52831dcab75
  435e49bf_bb2e_2016_ead7_0afb9d57ad71["langchain_core.prompts"]
  74c9c18b_11c5_b8f7_0fac_e554bc0a732b --> 435e49bf_bb2e_2016_ead7_0afb9d57ad71
  acd8d767_e952_a042_4fcf_15aa18858bfb["langchain_community.utilities"]
  74c9c18b_11c5_b8f7_0fac_e554bc0a732b --> acd8d767_e952_a042_4fcf_15aa18858bfb
  bc17d2e1_7cf6_0264_36b7_5541fc5ef1dd["langchain_community.vectorstores"]
  74c9c18b_11c5_b8f7_0fac_e554bc0a732b --> bc17d2e1_7cf6_0264_36b7_5541fc5ef1dd
  style 74c9c18b_11c5_b8f7_0fac_e554bc0a732b fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

"""Main entrypoint into package."""

import warnings
from importlib import metadata
from typing import Any

from langchain_core._api.deprecation import surface_langchain_deprecation_warnings

try:
    __version__ = metadata.version(__package__)
except metadata.PackageNotFoundError:
    # Case where package metadata is not available.
    __version__ = ""
del metadata  # optional, avoids polluting the results of dir(__package__)


def _warn_on_import(name: str, replacement: str | None = None) -> None:
    """Warn on import of deprecated module."""
    from langchain_classic._api.interactive_env import is_interactive_env

    if is_interactive_env():
        # No warnings for interactive environments.
        # This is done to avoid polluting the output of interactive environments
        # where users rely on auto-complete and may trigger this warning
        # even if they are not using any deprecated modules
        return

    if replacement:
        warnings.warn(
            f"Importing {name} from langchain root module is no longer supported. "
            f"Please use {replacement} instead.",
            stacklevel=3,
        )
    else:
        warnings.warn(
            f"Importing {name} from langchain root module is no longer supported.",
            stacklevel=3,
        )


# Surfaces Deprecation and Pending Deprecation warnings from langchain_classic.
surface_langchain_deprecation_warnings()


def __getattr__(name: str) -> Any:
    if name == "MRKLChain":
        from langchain_classic.agents import MRKLChain

        _warn_on_import(name, replacement="langchain_classic.agents.MRKLChain")

        return MRKLChain
    if name == "ReActChain":
        from langchain_classic.agents import ReActChain

        _warn_on_import(name, replacement="langchain_classic.agents.ReActChain")

        return ReActChain
    if name == "SelfAskWithSearchChain":
        from langchain_classic.agents import SelfAskWithSearchChain

// ... (365 more lines)

Domain

Subdomains

Functions

Dependencies

  • importlib
  • langchain_classic._api.interactive_env
  • langchain_classic.agents
  • langchain_classic.chains
  • langchain_community.docstore
  • langchain_community.llms
  • langchain_community.llms.huggingface_pipeline
  • langchain_community.utilities
  • langchain_community.vectorstores
  • langchain_core._api.deprecation
  • langchain_core.prompts
  • typing
  • warnings

Source

Frequently Asked Questions

What does __init__.py do?
__init__.py is a source file in the langchain codebase, written in python. It belongs to the LangChainCore domain, MessageInterface subdomain.
What functions are defined in __init__.py?
__init__.py defines 3 function(s): __getattr__, __version__, _warn_on_import.
What does __init__.py depend on?
__init__.py imports 13 module(s): importlib, langchain_classic._api.interactive_env, langchain_classic.agents, langchain_classic.chains, langchain_community.docstore, langchain_community.llms, langchain_community.llms.huggingface_pipeline, langchain_community.utilities, and 5 more.
Where is __init__.py in the architecture?
__init__.py is located at libs/langchain/langchain_classic/__init__.py (domain: LangChainCore, subdomain: MessageInterface, directory: libs/langchain/langchain_classic).

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