getattr() — langchain Function Reference

Architecture documentation for the __getattr__() function in __init__.py from the langchain codebase.

Function python LangChainCore ApiManagement

Entity Profile

LangChainCore→ ApiManagement→ __getattr__() — langchain Function Reference

Dependency Diagram

graph TD
  1e8e7e71_cee2_a33d_882d_30ff6c9fb2b2["__getattr__()"]
  a1f76670_9841_af32_e5be_02e7b2272945["__init__.py"]
  1e8e7e71_cee2_a33d_882d_30ff6c9fb2b2 -->|defined in| a1f76670_9841_af32_e5be_02e7b2272945
  style 1e8e7e71_cee2_a33d_882d_30ff6c9fb2b2 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/_api/__init__.py lines 60–78

def __getattr__(attr_name: str) -> object:
    """Dynamically import and return an attribute from a submodule.

    This function enables lazy loading of API functions from submodules, reducing
    initial import time and circular dependency issues.

    Args:
        attr_name: Name of the attribute to import.

    Returns:
        The imported attribute object.

    Raises:
        AttributeError: If the attribute is not a valid dynamic import.
    """
    module_name = _dynamic_imports.get(attr_name)
    result = import_attr(attr_name, module_name, __spec__.parent)
    globals()[attr_name] = result
    return result