visit_Subscript() — langchain Function Reference

Architecture documentation for the visit_Subscript() function in utils.py from the langchain codebase.

Function python LangChainCore Runnables calls 1

Entity Profile

LangChainCore→ Runnables→ visit_Subscript() — langchain Function Reference

Dependency Diagram

graph TD
  cc14f21a_0f9c_8e0e_974f_520ab20394fe["visit_Subscript()"]
  34ec985f_4eeb_84fd_e9b2_db2d097ff071["IsLocalDict"]
  cc14f21a_0f9c_8e0e_974f_520ab20394fe -->|defined in| 34ec985f_4eeb_84fd_e9b2_db2d097ff071
  e2142090_5e18_5f4c_23da_ad2e17947706["add()"]
  cc14f21a_0f9c_8e0e_974f_520ab20394fe -->|calls| e2142090_5e18_5f4c_23da_ad2e17947706
  style cc14f21a_0f9c_8e0e_974f_520ab20394fe fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/runnables/utils.py lines 172–186

    def visit_Subscript(self, node: ast.Subscript) -> None:
        """Visit a subscript node.

        Args:
            node: The node to visit.
        """
        if (
            isinstance(node.ctx, ast.Load)
            and isinstance(node.value, ast.Name)
            and node.value.id == self.name
            and isinstance(node.slice, ast.Constant)
            and isinstance(node.slice.value, str)
        ):
            # we've found a subscript access on the name we're looking for
            self.keys.add(node.slice.value)