_on_run_create() — langchain Function Reference

Architecture documentation for the _on_run_create() function in root_listeners.py from the langchain codebase.

Function python Observability Tracers calls 1 called by 1

Entity Profile

Observability→ Tracers→ _on_run_create() — langchain Function Reference

Dependency Diagram

graph TD
  6ba5dd85_d522_bdcf_17b7_eaaa793df704["_on_run_create()"]
  89d8d69c_785e_e71a_498a_04879f19121c["RootListenersTracer"]
  6ba5dd85_d522_bdcf_17b7_eaaa793df704 -->|defined in| 89d8d69c_785e_e71a_498a_04879f19121c
  5675113f_efde_1b0e_b0d7_5923081cc436["_on_run_create()"]
  5675113f_efde_1b0e_b0d7_5923081cc436 -->|calls| 6ba5dd85_d522_bdcf_17b7_eaaa793df704
  5675113f_efde_1b0e_b0d7_5923081cc436["_on_run_create()"]
  6ba5dd85_d522_bdcf_17b7_eaaa793df704 -->|calls| 5675113f_efde_1b0e_b0d7_5923081cc436
  style 6ba5dd85_d522_bdcf_17b7_eaaa793df704 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/tracers/root_listeners.py lines 58–65

    def _on_run_create(self, run: Run) -> None:
        if self.root_id is not None:
            return

        self.root_id = run.id

        if self._arg_on_start is not None:
            call_func_with_variable_args(self._arg_on_start, run, self.config)