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_on_chain_error() — langchain Function Reference

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

Function python Observability Tracers calls 3

Entity Profile

Dependency Diagram

graph TD
  a241034e_3f27_e335_bb6f_691ec2e801f8["_on_chain_error()"]
  56d9fac7_db71_9c71_7cac_1d680d392fa0["FunctionCallbackHandler"]
  a241034e_3f27_e335_bb6f_691ec2e801f8 -->|defined in| 56d9fac7_db71_9c71_7cac_1d680d392fa0
  1bda6774_d332_dec5_ed8f_8d6eef57961e["get_breadcrumbs()"]
  a241034e_3f27_e335_bb6f_691ec2e801f8 -->|calls| 1bda6774_d332_dec5_ed8f_8d6eef57961e
  78a56963_548a_2192_487f_472b05419cba["elapsed()"]
  a241034e_3f27_e335_bb6f_691ec2e801f8 -->|calls| 78a56963_548a_2192_487f_472b05419cba
  95875f96_0c2d_b364_e63a_651f8ed4cdcd["try_json_stringify()"]
  a241034e_3f27_e335_bb6f_691ec2e801f8 -->|calls| 95875f96_0c2d_b364_e63a_651f8ed4cdcd
  style a241034e_3f27_e335_bb6f_691ec2e801f8 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/tracers/stdout.py lines 125–134

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

Domain

Subdomains

Defined In

Calls

Source

Frequently Asked Questions

What does _on_chain_error() do?
_on_chain_error() is a function in the langchain codebase, defined in libs/core/langchain_core/tracers/stdout.py.
Where is _on_chain_error() defined?
_on_chain_error() is defined in libs/core/langchain_core/tracers/stdout.py at line 125.
What does _on_chain_error() call?
_on_chain_error() calls 3 function(s): elapsed, get_breadcrumbs, try_json_stringify.

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