mirror of
https://github.com/hwchase17/langchain
synced 2024-10-29 17:07:25 +00:00
113 lines
3.2 KiB
Python
113 lines
3.2 KiB
Python
"""A fake callback handler for testing purposes."""
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from typing import Any, Dict, List, Union
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from pydantic import BaseModel
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from langchain.callbacks.base import BaseCallbackHandler
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from langchain.schema import AgentAction, AgentFinish, LLMResult
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class FakeCallbackHandler(BaseModel, BaseCallbackHandler):
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"""Fake callback handler for testing."""
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starts: int = 0
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ends: int = 0
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errors: int = 0
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text: int = 0
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ignore_llm_: bool = False
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ignore_chain_: bool = False
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ignore_agent_: bool = False
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always_verbose_: bool = False
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@property
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def always_verbose(self) -> bool:
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"""Whether to call verbose callbacks even if verbose is False."""
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return self.always_verbose_
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@property
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def ignore_llm(self) -> bool:
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"""Whether to ignore LLM callbacks."""
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return self.ignore_llm_
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@property
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def ignore_chain(self) -> bool:
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"""Whether to ignore chain callbacks."""
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return self.ignore_chain_
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@property
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def ignore_agent(self) -> bool:
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"""Whether to ignore agent callbacks."""
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return self.ignore_agent_
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# add finer-grained counters for easier debugging of failing tests
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chain_starts: int = 0
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chain_ends: int = 0
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llm_starts: int = 0
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llm_ends: int = 0
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tool_starts: int = 0
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tool_ends: int = 0
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agent_ends: int = 0
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def on_llm_start(
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self, serialized: Dict[str, Any], prompts: List[str], **kwargs: Any
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) -> None:
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"""Run when LLM starts running."""
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self.llm_starts += 1
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self.starts += 1
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def on_llm_end(self, response: LLMResult, **kwargs: Any) -> None:
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"""Run when LLM ends running."""
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self.llm_ends += 1
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self.ends += 1
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def on_llm_error(
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self, error: Union[Exception, KeyboardInterrupt], **kwargs: Any
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) -> None:
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"""Run when LLM errors."""
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self.errors += 1
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def on_chain_start(
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self, serialized: Dict[str, Any], inputs: Dict[str, Any], **kwargs: Any
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) -> None:
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"""Run when chain starts running."""
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self.chain_starts += 1
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self.starts += 1
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def on_chain_end(self, outputs: Dict[str, Any], **kwargs: Any) -> None:
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"""Run when chain ends running."""
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self.chain_ends += 1
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self.ends += 1
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def on_chain_error(
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self, error: Union[Exception, KeyboardInterrupt], **kwargs: Any
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) -> None:
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"""Run when chain errors."""
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self.errors += 1
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def on_tool_start(
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self, serialized: Dict[str, Any], action: AgentAction, **kwargs: Any
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) -> None:
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"""Run when tool starts running."""
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self.tool_starts += 1
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self.starts += 1
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def on_tool_end(self, output: str, **kwargs: Any) -> None:
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"""Run when tool ends running."""
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self.tool_ends += 1
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self.ends += 1
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def on_tool_error(
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self, error: Union[Exception, KeyboardInterrupt], **kwargs: Any
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) -> None:
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"""Run when tool errors."""
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self.errors += 1
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def on_text(self, text: str, **kwargs: Any) -> None:
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"""Run when agent is ending."""
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self.text += 1
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def on_agent_finish(self, finish: AgentFinish, **kwargs: Any) -> None:
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"""Run when agent ends running."""
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self.agent_ends += 1
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self.ends += 1
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