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MultiTransformMiddleware Class — langchain Architecture

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

Class python

Entity Profile

Dependency Diagram

graph TD
  feae28b2_c94b_7ad9_e85f_c28adc953c1a["MultiTransformMiddleware"]
  949c7cf4_56fe_f3b4_cd89_9631a7e9cb1e["AgentMiddleware"]
  feae28b2_c94b_7ad9_e85f_c28adc953c1a -->|extends| 949c7cf4_56fe_f3b4_cd89_9631a7e9cb1e
  573473e5_eb93_a7d7_84ba_c975071c09af["test_wrap_model_call.py"]
  feae28b2_c94b_7ad9_e85f_c28adc953c1a -->|defined in| 573473e5_eb93_a7d7_84ba_c975071c09af
  d149d7ab_e978_d671_f585_520776475696["wrap_model_call()"]
  feae28b2_c94b_7ad9_e85f_c28adc953c1a -->|method| d149d7ab_e978_d671_f585_520776475696

Relationship Graph

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware/core/test_wrap_model_call.py lines 349–364

        class MultiTransformMiddleware(AgentMiddleware):
            def wrap_model_call(
                self,
                request: ModelRequest,
                handler: Callable[[ModelRequest], ModelResponse],
            ) -> ModelCallResult:
                result = handler(request)
                # result is ModelResponse, extract AIMessage from it
                ai_message = result.result[0]

                # First transformation: uppercase
                assert isinstance(ai_message.content, str)
                content = ai_message.content.upper()
                # Second transformation: add prefix and suffix
                content = f"[START] {content} [END]"
                return AIMessage(content=content)

Defined In

Extends

Source

Frequently Asked Questions

What is the MultiTransformMiddleware class?
MultiTransformMiddleware is a class in the langchain codebase, defined in libs/langchain_v1/tests/unit_tests/agents/middleware/core/test_wrap_model_call.py.
Where is MultiTransformMiddleware defined?
MultiTransformMiddleware is defined in libs/langchain_v1/tests/unit_tests/agents/middleware/core/test_wrap_model_call.py at line 349.
What does MultiTransformMiddleware extend?
MultiTransformMiddleware extends AgentMiddleware.

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