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FakeCallbackHandlerWithChatStart Class — langchain Architecture

Architecture documentation for the FakeCallbackHandlerWithChatStart class in callbacks.py from the langchain codebase.

Class python

Entity Profile

Dependency Diagram

graph TD
  370e4f75_3d64_586a_1f7d_7ea07c260efe["FakeCallbackHandlerWithChatStart"]
  8adec285_7535_1bed_5947_2a523043e071["FakeCallbackHandler"]
  370e4f75_3d64_586a_1f7d_7ea07c260efe -->|extends| 8adec285_7535_1bed_5947_2a523043e071
  b9553aad_b797_0a7b_73ed_8d05b0819c0f["BaseMessage"]
  370e4f75_3d64_586a_1f7d_7ea07c260efe -->|extends| b9553aad_b797_0a7b_73ed_8d05b0819c0f
  1a55dbf4_797a_ab13_7a68_4592e2c8463c["callbacks.py"]
  370e4f75_3d64_586a_1f7d_7ea07c260efe -->|defined in| 1a55dbf4_797a_ab13_7a68_4592e2c8463c
  0e0c8eaa_8dfb_ceda_3354_bc7bff863f6d["on_chat_model_start()"]
  370e4f75_3d64_586a_1f7d_7ea07c260efe -->|method| 0e0c8eaa_8dfb_ceda_3354_bc7bff863f6d

Relationship Graph

Source Code

libs/partners/openai/tests/unit_tests/fake/callbacks.py lines 197–208

class FakeCallbackHandlerWithChatStart(FakeCallbackHandler):
    def on_chat_model_start(
        self,
        serialized: dict[str, Any],
        messages: list[list[BaseMessage]],
        *,
        run_id: UUID,
        parent_run_id: UUID | None = None,
        **kwargs: Any,
    ) -> Any:
        assert all(isinstance(m, BaseMessage) for m in chain(*messages))
        self.on_chat_model_start_common()

Defined In

Extends

Source

Frequently Asked Questions

What is the FakeCallbackHandlerWithChatStart class?
FakeCallbackHandlerWithChatStart is a class in the langchain codebase, defined in libs/partners/openai/tests/unit_tests/fake/callbacks.py.
Where is FakeCallbackHandlerWithChatStart defined?
FakeCallbackHandlerWithChatStart is defined in libs/partners/openai/tests/unit_tests/fake/callbacks.py at line 197.
What does FakeCallbackHandlerWithChatStart extend?
FakeCallbackHandlerWithChatStart extends FakeCallbackHandler, BaseMessage.

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