langchain Architecture Docs
Home / Class/ Expr Class — langchain Architecture

Expr Class — langchain Architecture

Architecture documentation for the Expr class in structured_query.py from the langchain codebase.

Class python

Entity Profile

Dependency Diagram

graph TD
  ce7f9330_c85c_8cab_391e_08d83c35d973["Expr"]
  2910db70_4057_4517_fbc4_a618465c787c["structured_query.py"]
  ce7f9330_c85c_8cab_391e_08d83c35d973 -->|defined in| 2910db70_4057_4517_fbc4_a618465c787c
  c82c5eeb_41c4_58d2_63ce_889c07548c04["accept()"]
  ce7f9330_c85c_8cab_391e_08d83c35d973 -->|method| c82c5eeb_41c4_58d2_63ce_889c07548c04

Relationship Graph

Source Code

libs/core/langchain_core/structured_query.py lines 82–96

class Expr(BaseModel):
    """Base class for all expressions."""

    def accept(self, visitor: Visitor) -> Any:
        """Accept a visitor.

        Args:
            visitor: visitor to accept.

        Returns:
            result of visiting.
        """
        return getattr(visitor, f"visit_{_to_snake_case(self.__class__.__name__)}")(
            self
        )

Defined In

Source

Frequently Asked Questions

What is the Expr class?
Expr is a class in the langchain codebase, defined in libs/core/langchain_core/structured_query.py.
Where is Expr defined?
Expr is defined in libs/core/langchain_core/structured_query.py at line 82.

Analyze Your Own Codebase

Get architecture documentation, dependency graphs, and domain analysis for your codebase in minutes.

Try Supermodel Free