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FailingModel Class — langchain Architecture

Architecture documentation for the FailingModel class in test_model_fallback.py from the langchain codebase.

Class python

Entity Profile

Dependency Diagram

graph TD
  a4a0a412_333c_1872_e7fa_aa5619b788b0["FailingModel"]
  0f829642_e361_67a1_cbca_f82839bbbd31["GenericFakeChatModel"]
  a4a0a412_333c_1872_e7fa_aa5619b788b0 -->|extends| 0f829642_e361_67a1_cbca_f82839bbbd31
  48aa29b8_65e7_522f_a445_a441eeb6baff["BaseChatModel"]
  a4a0a412_333c_1872_e7fa_aa5619b788b0 -->|extends| 48aa29b8_65e7_522f_a445_a441eeb6baff
  c6372e75_e4e3_ed20_8230_4be219762f0f["test_model_fallback.py"]
  a4a0a412_333c_1872_e7fa_aa5619b788b0 -->|defined in| c6372e75_e4e3_ed20_8230_4be219762f0f
  fc62f046_017a_e638_7bb9_4717283b8bd6["_generate()"]
  a4a0a412_333c_1872_e7fa_aa5619b788b0 -->|method| fc62f046_017a_e638_7bb9_4717283b8bd6
  6fcf00cc_28c5_96c2_9c24_987556d1c13e["_llm_type()"]
  a4a0a412_333c_1872_e7fa_aa5619b788b0 -->|method| 6fcf00cc_28c5_96c2_9c24_987556d1c13e

Relationship Graph

Source Code

libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_model_fallback.py lines 100–110

    class FailingModel(GenericFakeChatModel):
        @override
        def _generate(
            self,
            messages: list[BaseMessage],
            stop: list[str] | None = None,
            run_manager: CallbackManagerForLLMRun | None = None,
            **kwargs: Any,
        ) -> ChatResult:
            msg = "Model failed"
            raise ValueError(msg)

Defined In

Extends

Source

Frequently Asked Questions

What is the FailingModel class?
FailingModel is a class in the langchain codebase, defined in libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_model_fallback.py.
Where is FailingModel defined?
FailingModel is defined in libs/langchain_v1/tests/unit_tests/agents/middleware/implementations/test_model_fallback.py at line 100.
What does FailingModel extend?
FailingModel extends GenericFakeChatModel, BaseChatModel.

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