langchain_core.callbacks.base
.BaseCallbackManager¶
- class langchain_core.callbacks.base.BaseCallbackManager(handlers: List[BaseCallbackHandler], inheritable_handlers: Optional[List[BaseCallbackHandler]] = None, parent_run_id: Optional[UUID] = None, *, tags: Optional[List[str]] = None, inheritable_tags: Optional[List[str]] = None, metadata: Optional[Dict[str, Any]] = None, inheritable_metadata: Optional[Dict[str, Any]] = None)[source]¶
Base callback manager that handles callbacks from LangChain.
Initialize callback manager.
Attributes
is_async
Whether the callback manager is async.
Methods
__init__
(handlers[, inheritable_handlers, ...])Initialize callback manager.
add_handler
(handler[, inherit])Add a handler to the callback manager.
add_metadata
(metadata[, inherit])add_tags
(tags[, inherit])copy
()Copy the callback manager.
on_chain_start
(serialized, inputs, *, run_id)Run when chain starts running.
on_chat_model_start
(serialized, messages, *, ...)Run when a chat model starts running.
on_llm_start
(serialized, prompts, *, run_id)Run when LLM starts running.
on_retriever_start
(serialized, query, *, run_id)Run when Retriever starts running.
on_tool_start
(serialized, input_str, *, run_id)Run when tool starts running.
remove_handler
(handler)Remove a handler from the callback manager.
remove_metadata
(keys)remove_tags
(tags)set_handler
(handler[, inherit])Set handler as the only handler on the callback manager.
set_handlers
(handlers[, inherit])Set handlers as the only handlers on the callback manager.
- __init__(handlers: List[BaseCallbackHandler], inheritable_handlers: Optional[List[BaseCallbackHandler]] = None, parent_run_id: Optional[UUID] = None, *, tags: Optional[List[str]] = None, inheritable_tags: Optional[List[str]] = None, metadata: Optional[Dict[str, Any]] = None, inheritable_metadata: Optional[Dict[str, Any]] = None) None [source]¶
Initialize callback manager.
- add_handler(handler: BaseCallbackHandler, inherit: bool = True) None [source]¶
Add a handler to the callback manager.
- on_chain_start(serialized: Dict[str, Any], inputs: Dict[str, Any], *, run_id: UUID, parent_run_id: Optional[UUID] = None, tags: Optional[List[str]] = None, metadata: Optional[Dict[str, Any]] = None, **kwargs: Any) Any ¶
Run when chain starts running.
- on_chat_model_start(serialized: Dict[str, Any], messages: List[List[BaseMessage]], *, run_id: UUID, parent_run_id: Optional[UUID] = None, tags: Optional[List[str]] = None, metadata: Optional[Dict[str, Any]] = None, **kwargs: Any) Any ¶
Run when a chat model starts running.
- on_llm_start(serialized: Dict[str, Any], prompts: List[str], *, run_id: UUID, parent_run_id: Optional[UUID] = None, tags: Optional[List[str]] = None, metadata: Optional[Dict[str, Any]] = None, **kwargs: Any) Any ¶
Run when LLM starts running.
- on_retriever_start(serialized: Dict[str, Any], query: str, *, run_id: UUID, parent_run_id: Optional[UUID] = None, tags: Optional[List[str]] = None, metadata: Optional[Dict[str, Any]] = None, **kwargs: Any) Any ¶
Run when Retriever starts running.
- on_tool_start(serialized: Dict[str, Any], input_str: str, *, run_id: UUID, parent_run_id: Optional[UUID] = None, tags: Optional[List[str]] = None, metadata: Optional[Dict[str, Any]] = None, **kwargs: Any) Any ¶
Run when tool starts running.
- remove_handler(handler: BaseCallbackHandler) None [source]¶
Remove a handler from the callback manager.
- set_handler(handler: BaseCallbackHandler, inherit: bool = True) None [source]¶
Set handler as the only handler on the callback manager.
- set_handlers(handlers: List[BaseCallbackHandler], inherit: bool = True) None [source]¶
Set handlers as the only handlers on the callback manager.