_FakeExceptionTool Class — langchain Architecture

Architecture documentation for the _FakeExceptionTool class in test_tools.py from the langchain codebase.

Class python

Entity Profile

Dependency Diagram

graph TD
  ba77f44b_4604_f20b_e6d1_a2497fc9038c["_FakeExceptionTool"]
  18e85ff8_9a5d_f800_f722_027398dc89e7["BaseTool"]
  ba77f44b_4604_f20b_e6d1_a2497fc9038c -->|extends| 18e85ff8_9a5d_f800_f722_027398dc89e7
  8e7836ae_e72c_f670_72a5_4ca6d46e3555["test_tools.py"]
  ba77f44b_4604_f20b_e6d1_a2497fc9038c -->|defined in| 8e7836ae_e72c_f670_72a5_4ca6d46e3555
  223a741d_bc48_c8df_71d4_90f5aa93b87c["_run()"]
  ba77f44b_4604_f20b_e6d1_a2497fc9038c -->|method| 223a741d_bc48_c8df_71d4_90f5aa93b87c
  d42c73f3_e431_ef29_4af9_1be6b41c749b["_arun()"]
  ba77f44b_4604_f20b_e6d1_a2497fc9038c -->|method| d42c73f3_e431_ef29_4af9_1be6b41c749b

Relationship Graph

Source Code

libs/core/tests/unit_tests/test_tools.py lines 774–783

class _FakeExceptionTool(BaseTool):
    name: str = "exception"
    description: str = "an exception-throwing tool"
    exception: Exception = ToolException()

    def _run(self) -> str:
        raise self.exception

    async def _arun(self) -> str:
        raise self.exception