"""Tracers that record execution of LangChain runs."""
from typing import TYPE_CHECKING, Any
from langchain_core.tracers.langchain import LangChainTracer
from langchain_core.tracers.langchain_v1 import LangChainTracerV1
from langchain_core.tracers.stdout import (
ConsoleCallbackHandler,
FunctionCallbackHandler,
)
from langchain._api import create_importer
from langchain.callbacks.tracers.logging import LoggingCallbackHandler
if TYPE_CHECKING:
from langchain_community.callbacks.tracers.wandb import WandbTracer
# Create a way to dynamically look up deprecated imports.
# Used to consolidate logic for raising deprecation warnings and
# handling optional imports.
DEPRECATED_LOOKUP = {"WandbTracer": "langchain_community.callbacks.tracers.wandb"}
_import_attribute = create_importer(__file__, deprecated_lookups=DEPRECATED_LOOKUP)
def __getattr__(name: str) -> Any:
"""Look up attributes dynamically."""
return _import_attribute(name)
__all__ = [
"ConsoleCallbackHandler",
"FunctionCallbackHandler",
"LoggingCallbackHandler",
"LangChainTracer",
"LangChainTracerV1",
"WandbTracer",
]