extract_deprecated_lookup() — langchain Function Reference

Architecture documentation for the extract_deprecated_lookup() function in test_imports.py from the langchain codebase.

Function python LangChainCore MessageInterface calls 1 called by 1

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LangChainCore→ MessageInterface→ extract_deprecated_lookup() — langchain Function Reference

Dependency Diagram

graph TD
  97d4d94c_65f3_c42b_7930_3764d443c63a["extract_deprecated_lookup()"]
  1a4ae21b_d553_aa88_bac6_fd6971a4e02d["test_imports.py"]
  97d4d94c_65f3_c42b_7930_3764d443c63a -->|defined in| 1a4ae21b_d553_aa88_bac6_fd6971a4e02d
  259c1875_6b99_3d5e_ea98_57f1d0b4bb46["test_no_more_changes_to_proxy_community()"]
  259c1875_6b99_3d5e_ea98_57f1d0b4bb46 -->|calls| 97d4d94c_65f3_c42b_7930_3764d443c63a
  ed754162_a014_59bf_8b3f_a17462a35481["_dict_from_ast()"]
  97d4d94c_65f3_c42b_7930_3764d443c63a -->|calls| ed754162_a014_59bf_8b3f_a17462a35481
  style 97d4d94c_65f3_c42b_7930_3764d443c63a fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain/tests/unit_tests/test_imports.py lines 111–133

def extract_deprecated_lookup(file_path: str) -> dict[str, Any] | None:
    """Detect and extracts the value of a dictionary named `DEPRECATED_LOOKUP`.

    This variable is located in the global namespace of a Python file.

    Args:
        file_path: The path to the Python file.

    Returns:
        The value of `DEPRECATED_LOOKUP` if it exists, `None` otherwise.
    """
    tree = ast.parse(Path(file_path).read_text(encoding="utf-8"), filename=file_path)

    for node in ast.walk(tree):
        if isinstance(node, ast.Assign):
            for target in node.targets:
                if (
                    isinstance(target, ast.Name)
                    and target.id == "DEPRECATED_LOOKUP"
                    and isinstance(node.value, ast.Dict)
                ):
                    return _dict_from_ast(node.value)
    return None