FakeTracer Class — langchain Architecture

Architecture documentation for the FakeTracer class in test_base.py from the langchain codebase.

Class python

Entity Profile

Dependency Diagram

graph TD
  f6e7464d_212c_7e05_a5b3_afca6c7b4191["FakeTracer"]
  0f6b3261_31fa_c34e_ca33_cb141bdf78ff["BaseTracer"]
  f6e7464d_212c_7e05_a5b3_afca6c7b4191 -->|extends| 0f6b3261_31fa_c34e_ca33_cb141bdf78ff
  48232d20_f8c1_b597_14fa_7dc407e9bfe5["test_base.py"]
  f6e7464d_212c_7e05_a5b3_afca6c7b4191 -->|defined in| 48232d20_f8c1_b597_14fa_7dc407e9bfe5
  8a5f2306_e02f_a2ee_4bbe_df707cbed469["__init__()"]
  f6e7464d_212c_7e05_a5b3_afca6c7b4191 -->|method| 8a5f2306_e02f_a2ee_4bbe_df707cbed469
  1d2c9586_68a2_94db_7634_b05491f65c41["_persist_run()"]
  f6e7464d_212c_7e05_a5b3_afca6c7b4191 -->|method| 1d2c9586_68a2_94db_7634_b05491f65c41
  39013391_b6d4_4e7c_b5af_adc5968706c4["on_chat_model_start()"]
  f6e7464d_212c_7e05_a5b3_afca6c7b4191 -->|method| 39013391_b6d4_4e7c_b5af_adc5968706c4

Relationship Graph

Source Code

libs/partners/openai/tests/unit_tests/chat_models/test_base.py lines 2454–2464

class FakeTracer(BaseTracer):
    def __init__(self) -> None:
        super().__init__()
        self.chat_model_start_inputs: list = []

    def _persist_run(self, run: Run) -> None:
        """Persist a run."""

    def on_chat_model_start(self, *args: Any, **kwargs: Any) -> Run:
        self.chat_model_start_inputs.append({"args": args, "kwargs": kwargs})
        return super().on_chat_model_start(*args, **kwargs)