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improve `AsyncCallbackManager` (#2410)

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doc
Ankush Gola 1 year ago committed by GitHub
parent af7f20fa42
commit 4d730a9bbc
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2 changed files with 76 additions and 143 deletions
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214
langchain/callbacks/base.py
Unescape Escape View File

@ -2,7 +2,7 @@
import asyncio
import functools
from abc import ABC, abstractmethod
from typing import Any, Dict, List, Union
from typing import Any, Dict, List, Optional, Union
from langchain.schema import AgentAction, AgentFinish, LLMResult
@ -328,6 +328,25 @@ class AsyncCallbackHandler(BaseCallbackHandler):
"""Run on agent end."""
async def _handle_event_for_handler(
handler: BaseCallbackHandler,
event_name: str,
ignore_condition_name: Optional[str],
verbose: bool,
*args: Any,
**kwargs: Any
) -> None:
if ignore_condition_name is None or not getattr(handler, ignore_condition_name):
if verbose or handler.always_verbose:
event = getattr(handler, event_name)
if asyncio.iscoroutinefunction(event):
await event(*args, **kwargs)
else:
await asyncio.get_event_loop().run_in_executor(
None, functools.partial(event, *args, **kwargs)
)
class AsyncCallbackManager(BaseCallbackManager):
"""Async callback manager that can be used to handle callbacks from LangChain."""
@ -340,6 +359,24 @@ class AsyncCallbackManager(BaseCallbackManager):
"""Initialize callback manager."""
self.handlers: List[BaseCallbackHandler] = handlers
async def _handle_event(
self,
event_name: str,
ignore_condition_name: Optional[str],
verbose: bool,
*args: Any,
**kwargs: Any
) -> None:
"""Generic event handler for AsyncCallbackManager."""
await asyncio.gather(
*(
_handle_event_for_handler(
handler, event_name, ignore_condition_name, verbose, *args, **kwargs
)
for handler in self.handlers
)
)
async def on_llm_start(
self,
serialized: Dict[str, Any],
@ -348,50 +385,25 @@ class AsyncCallbackManager(BaseCallbackManager):
**kwargs: Any
) -> None:
"""Run when LLM starts running."""
for handler in self.handlers:
if not handler.ignore_llm:
if verbose or handler.always_verbose:
if asyncio.iscoroutinefunction(handler.on_llm_start):
await handler.on_llm_start(serialized, prompts, **kwargs)
else:
await asyncio.get_event_loop().run_in_executor(
None,
functools.partial(
handler.on_llm_start, serialized, prompts, **kwargs
),
)
await self._handle_event(
"on_llm_start", "ignore_llm", verbose, serialized, prompts, **kwargs
)
async def on_llm_new_token(
self, token: str, verbose: bool = False, **kwargs: Any
) -> None:
"""Run on new LLM token. Only available when streaming is enabled."""
for handler in self.handlers:
if not handler.ignore_llm:
if verbose or handler.always_verbose:
if asyncio.iscoroutinefunction(handler.on_llm_new_token):
await handler.on_llm_new_token(token, **kwargs)
else:
await asyncio.get_event_loop().run_in_executor(
None,
functools.partial(
handler.on_llm_new_token, token, **kwargs
),
)
await self._handle_event(
"on_llm_new_token", "ignore_llm", verbose, token, **kwargs
)
async def on_llm_end(
self, response: LLMResult, verbose: bool = False, **kwargs: Any
) -> None:
"""Run when LLM ends running."""
for handler in self.handlers:
if not handler.ignore_llm:
if verbose or handler.always_verbose:
if asyncio.iscoroutinefunction(handler.on_llm_end):
await handler.on_llm_end(response, **kwargs)
else:
await asyncio.get_event_loop().run_in_executor(
None,
functools.partial(handler.on_llm_end, response, **kwargs),
)
await self._handle_event(
"on_llm_end", "ignore_llm", verbose, response, **kwargs
)
async def on_llm_error(
self,
@ -400,16 +412,7 @@ class AsyncCallbackManager(BaseCallbackManager):
**kwargs: Any
) -> None:
"""Run when LLM errors."""
for handler in self.handlers:
if not handler.ignore_llm:
if verbose or handler.always_verbose:
if asyncio.iscoroutinefunction(handler.on_llm_error):
await handler.on_llm_error(error, **kwargs)
else:
await asyncio.get_event_loop().run_in_executor(
None,
functools.partial(handler.on_llm_error, error, **kwargs),
)
await self._handle_event("on_llm_error", "ignore_llm", verbose, error, **kwargs)
async def on_chain_start(
self,
@ -419,33 +422,17 @@ class AsyncCallbackManager(BaseCallbackManager):
**kwargs: Any
) -> None:
"""Run when chain starts running."""
for handler in self.handlers:
if not handler.ignore_chain:
if verbose or handler.always_verbose:
if asyncio.iscoroutinefunction(handler.on_chain_start):
await handler.on_chain_start(serialized, inputs, **kwargs)
else:
await asyncio.get_event_loop().run_in_executor(
None,
functools.partial(
handler.on_chain_start, serialized, inputs, **kwargs
),
)
await self._handle_event(
"on_chain_start", "ignore_chain", verbose, serialized, inputs, **kwargs
)
async def on_chain_end(
self, outputs: Dict[str, Any], verbose: bool = False, **kwargs: Any
) -> None:
"""Run when chain ends running."""
for handler in self.handlers:
if not handler.ignore_chain:
if verbose or handler.always_verbose:
if asyncio.iscoroutinefunction(handler.on_chain_end):
await handler.on_chain_end(outputs, **kwargs)
else:
await asyncio.get_event_loop().run_in_executor(
None,
functools.partial(handler.on_chain_end, outputs, **kwargs),
)
await self._handle_event(
"on_chain_end", "ignore_chain", verbose, outputs, **kwargs
)
async def on_chain_error(
self,
@ -454,16 +441,9 @@ class AsyncCallbackManager(BaseCallbackManager):
**kwargs: Any
) -> None:
"""Run when chain errors."""
for handler in self.handlers:
if not handler.ignore_chain:
if verbose or handler.always_verbose:
if asyncio.iscoroutinefunction(handler.on_chain_error):
await handler.on_chain_error(error, **kwargs)
else:
await asyncio.get_event_loop().run_in_executor(
None,
functools.partial(handler.on_chain_error, error, **kwargs),
)
await self._handle_event(
"on_chain_error", "ignore_chain", verbose, error, **kwargs
)
async def on_tool_start(
self,
@ -473,33 +453,17 @@ class AsyncCallbackManager(BaseCallbackManager):
**kwargs: Any
) -> None:
"""Run when tool starts running."""
for handler in self.handlers:
if not handler.ignore_agent:
if verbose or handler.always_verbose:
if asyncio.iscoroutinefunction(handler.on_tool_start):
await handler.on_tool_start(serialized, input_str, **kwargs)
else:
await asyncio.get_event_loop().run_in_executor(
None,
functools.partial(
handler.on_tool_start, serialized, input_str, **kwargs
),
)
await self._handle_event(
"on_tool_start", "ignore_agent", verbose, serialized, input_str, **kwargs
)
async def on_tool_end(
self, output: str, verbose: bool = False, **kwargs: Any
) -> None:
"""Run when tool ends running."""
for handler in self.handlers:
if not handler.ignore_agent:
if verbose or handler.always_verbose:
if asyncio.iscoroutinefunction(handler.on_tool_end):
await handler.on_tool_end(output, **kwargs)
else:
await asyncio.get_event_loop().run_in_executor(
None,
functools.partial(handler.on_tool_end, output, **kwargs),
)
await self._handle_event(
"on_tool_end", "ignore_agent", verbose, output, **kwargs
)
async def on_tool_error(
self,
@ -508,61 +472,29 @@ class AsyncCallbackManager(BaseCallbackManager):
**kwargs: Any
) -> None:
"""Run when tool errors."""
for handler in self.handlers:
if not handler.ignore_agent:
if verbose or handler.always_verbose:
if asyncio.iscoroutinefunction(handler.on_tool_error):
await handler.on_tool_error(error, **kwargs)
else:
await asyncio.get_event_loop().run_in_executor(
None,
functools.partial(handler.on_tool_error, error, **kwargs),
)
await self._handle_event(
"on_tool_error", "ignore_agent", verbose, error, **kwargs
)
async def on_text(self, text: str, verbose: bool = False, **kwargs: Any) -> None:
"""Run when text is printed."""
for handler in self.handlers:
if verbose or handler.always_verbose:
if asyncio.iscoroutinefunction(handler.on_text):
await handler.on_text(text, **kwargs)
else:
await asyncio.get_event_loop().run_in_executor(
None, functools.partial(handler.on_text, text, **kwargs)
)
await self._handle_event("on_text", None, verbose, text, **kwargs)
async def on_agent_action(
self, action: AgentAction, verbose: bool = False, **kwargs: Any
) -> None:
"""Run on agent action."""
for handler in self.handlers:
if not handler.ignore_agent:
if verbose or handler.always_verbose:
if asyncio.iscoroutinefunction(handler.on_agent_action):
await handler.on_agent_action(action, **kwargs)
else:
await asyncio.get_event_loop().run_in_executor(
None,
functools.partial(
handler.on_agent_action, action, **kwargs
),
)
await self._handle_event(
"on_agent_action", "ignore_agent", verbose, action, **kwargs
)
async def on_agent_finish(
self, finish: AgentFinish, verbose: bool = False, **kwargs: Any
) -> None:
"""Run when agent finishes."""
for handler in self.handlers:
if not handler.ignore_agent:
if verbose or handler.always_verbose:
if asyncio.iscoroutinefunction(handler.on_agent_finish):
await handler.on_agent_finish(finish, **kwargs)
else:
await asyncio.get_event_loop().run_in_executor(
None,
functools.partial(
handler.on_agent_finish, finish, **kwargs
),
)
await self._handle_event(
"on_agent_finish", "ignore_agent", verbose, finish, **kwargs
)
def add_handler(self, handler: BaseCallbackHandler) -> None:
"""Add a handler to the callback manager."""

5
tests/unit_tests/callbacks/test_callback_manager.py
Unescape Escape View File

@ -176,5 +176,6 @@ async def test_async_callback_manager_sync_handler() -> None:
"""Test the AsyncCallbackManager."""
handler1 = FakeCallbackHandler(always_verbose_=True)
handler2 = FakeAsyncCallbackHandler()
manager = AsyncCallbackManager([handler1, handler2])
await _test_callback_manager_async(manager, handler1, handler2)
handler3 = FakeAsyncCallbackHandler(always_verbose_=True)
manager = AsyncCallbackManager([handler1, handler2, handler3])
await _test_callback_manager_async(manager, handler1, handler2, handler3)

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