collect_runs() — langchain Function Reference

Architecture documentation for the collect_runs() function in context.py from the langchain codebase.

Function python Observability Tracers

Entity Profile

Observability→ Tracers→ collect_runs() — langchain Function Reference

Dependency Diagram

graph TD
  74d4cdfa_4571_6b88_0d77_072961ad25d1["collect_runs()"]
  b631c948_af4b_1ae8_be2d_c334ff40ecef["context.py"]
  74d4cdfa_4571_6b88_0d77_072961ad25d1 -->|defined in| b631c948_af4b_1ae8_be2d_c334ff40ecef
  style 74d4cdfa_4571_6b88_0d77_072961ad25d1 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/tracers/context.py lines 86–102

def collect_runs() -> Generator[RunCollectorCallbackHandler, None, None]:
    """Collect all run traces in context.

    Yields:
        The run collector callback handler.

    Example:
        >>> with collect_runs() as runs_cb:
                chain.invoke("foo")
                run_id = runs_cb.traced_runs[0].id
    """
    cb = RunCollectorCallbackHandler()
    token = run_collector_var.set(cb)
    try:
        yield cb
    finally:
        run_collector_var.reset(token)