ThirdMiddleware Class — langchain Architecture

Architecture documentation for the ThirdMiddleware class in test_wrap_model_call.py from the langchain codebase.

Class python

Entity Profile

Dependency Diagram

graph TD
  238a30bd_956a_bf23_5abc_58186454a44e["ThirdMiddleware"]
  949c7cf4_56fe_f3b4_cd89_9631a7e9cb1e["AgentMiddleware"]
  238a30bd_956a_bf23_5abc_58186454a44e -->|extends| 949c7cf4_56fe_f3b4_cd89_9631a7e9cb1e
  573473e5_eb93_a7d7_84ba_c975071c09af["test_wrap_model_call.py"]
  238a30bd_956a_bf23_5abc_58186454a44e -->|defined in| 573473e5_eb93_a7d7_84ba_c975071c09af
  7d3c6a10_e84e_ee82_bbff_dc87b4be2814["wrap_model_call()"]
  238a30bd_956a_bf23_5abc_58186454a44e -->|method| 7d3c6a10_e84e_ee82_bbff_dc87b4be2814

Relationship Graph

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware/core/test_wrap_model_call.py lines 746–755

        class ThirdMiddleware(AgentMiddleware):
            def wrap_model_call(
                self,
                request: ModelRequest,
                handler: Callable[[ModelRequest], ModelResponse],
            ) -> ModelCallResult:
                execution_order.append("third-before")
                response = handler(request)
                execution_order.append("third-after")
                return response