_on_tool_error() — langchain Function Reference

Architecture documentation for the _on_tool_error() function in stdout.py from the langchain codebase.

Function python Observability Tracers calls 2

Entity Profile

Observability→ Tracers→ _on_tool_error() — langchain Function Reference

Dependency Diagram

graph TD
  5033d38b_82f3_04f4_25ae_b621fca57066["_on_tool_error()"]
  56d9fac7_db71_9c71_7cac_1d680d392fa0["FunctionCallbackHandler"]
  5033d38b_82f3_04f4_25ae_b621fca57066 -->|defined in| 56d9fac7_db71_9c71_7cac_1d680d392fa0
  1bda6774_d332_dec5_ed8f_8d6eef57961e["get_breadcrumbs()"]
  5033d38b_82f3_04f4_25ae_b621fca57066 -->|calls| 1bda6774_d332_dec5_ed8f_8d6eef57961e
  78a56963_548a_2192_487f_472b05419cba["elapsed()"]
  5033d38b_82f3_04f4_25ae_b621fca57066 -->|calls| 78a56963_548a_2192_487f_472b05419cba
  style 5033d38b_82f3_04f4_25ae_b621fca57066 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/tracers/stdout.py lines 188–195

    def _on_tool_error(self, run: Run) -> None:
        crumbs = self.get_breadcrumbs(run)
        self.function_callback(
            f"{get_colored_text('[tool/error]', color='red')} "
            + get_bolded_text(f"[{crumbs}] [{elapsed(run)}] ")
            + f"Tool run errored with error:\n"
            f"{run.error}"
        )