tracers

Tracers are classes for tracing runs.

Class hierarchy:

BaseCallbackHandler --> BaseTracer --> <name>Tracer  # Examples: LangChainTracer, RootListenersTracer
                                   --> <name>  # Examples: LogStreamCallbackHandler

Classes

tracers.base.AsyncBaseTracer(*[, _schema_format])	Async Base interface for tracers.
tracers.base.BaseTracer(*[, _schema_format])	Base interface for tracers.
tracers.evaluation.EvaluatorCallbackHandler(...)	Tracer that runs a run evaluator whenever a run is persisted.
tracers.event_stream.RunInfo	Information about a run.
tracers.langchain.LangChainTracer([...])	Implementation of the SharedTracer that POSTS to the LangChain endpoint.
tracers.log_stream.LogEntry	A single entry in the run log.
tracers.log_stream.LogStreamCallbackHandler(*)	Tracer that streams run logs to a stream.
tracers.log_stream.RunLog(*ops, state)	Run log.
tracers.log_stream.RunLogPatch(*ops)	Patch to the run log.
tracers.log_stream.RunState	State of the run.
tracers.root_listeners.AsyncRootListenersTracer(*, ...)	Async Tracer that calls listeners on run start, end, and error.
tracers.root_listeners.RootListenersTracer(*, ...)	Tracer that calls listeners on run start, end, and error.
tracers.run_collector.RunCollectorCallbackHandler([...])	Tracer that collects all nested runs in a list.
tracers.schemas.Run	Run schema for the V2 API in the Tracer.
tracers.stdout.ConsoleCallbackHandler(**kwargs)	Tracer that prints to the console.
tracers.stdout.FunctionCallbackHandler(...)	Tracer that calls a function with a single str parameter.

Functions

tracers.context.collect_runs()	Collect all run traces in context.
tracers.context.register_configure_hook(...)	Register a configure hook.
tracers.context.tracing_enabled([session_name])	Throw an error because this has been replaced by tracing_v2_enabled.
tracers.context.tracing_v2_enabled([...])	Instruct LangChain to log all runs in context to LangSmith.
tracers.evaluation.wait_for_all_evaluators()	Wait for all tracers to finish.
tracers.langchain.get_client()	Get the client.
tracers.langchain.log_error_once(method, ...)	Log an error once.
tracers.langchain.wait_for_all_tracers()	Wait for all tracers to finish.
tracers.langchain_v1.LangChainTracerV1(...)	Throw an error because this has been replaced by LangChainTracer.
tracers.langchain_v1.get_headers(*args, **kwargs)	Throw an error because this has been replaced by get_headers.
tracers.stdout.elapsed(run)	Get the elapsed time of a run.
tracers.stdout.try_json_stringify(obj, fallback)	Try to stringify an object to JSON.

Deprecated classes

tracers.schemas.BaseRun
tracers.schemas.ChainRun
tracers.schemas.LLMRun
tracers.schemas.ToolRun
tracers.schemas.TracerSession
tracers.schemas.TracerSessionBase
tracers.schemas.TracerSessionV1
tracers.schemas.TracerSessionV1Base
tracers.schemas.TracerSessionV1Create

Deprecated functions

tracers.schemas.RunTypeEnum()