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增加了仅限GPT4的agent功能，陆续补充，中文版readme已写 (#1611)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| from uuid import UUID | ||
| from langchain.callbacks import AsyncIteratorCallbackHandler | ||
| import json | ||
| import asyncio | ||
| from typing import Any, Dict, List, Optional | ||
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| from langchain.schema import AgentFinish, AgentAction | ||
| from langchain.schema.output import LLMResult | ||
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| def dumps(obj: Dict) -> str: | ||
| return json.dumps(obj, ensure_ascii=False) | ||
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| class Status: | ||
| start: int = 1 | ||
| running: int = 2 | ||
| complete: int = 3 | ||
| agent_action: int = 4 | ||
| agent_finish: int = 5 | ||
| error: int = 6 | ||
| make_tool: int = 7 | ||
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| class CustomAsyncIteratorCallbackHandler(AsyncIteratorCallbackHandler): | ||
| def __init__(self): | ||
| super().__init__() | ||
| self.queue = asyncio.Queue() | ||
| self.done = asyncio.Event() | ||
| self.cur_tool = {} | ||
| self.out = True | ||
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| async def on_tool_start(self, serialized: Dict[str, Any], input_str: str, *, run_id: UUID, | ||
| parent_run_id: UUID | None = None, tags: List[str] | None = None, | ||
| metadata: Dict[str, Any] | None = None, **kwargs: Any) -> None: | ||
| self.cur_tool = { | ||
| "tool_name": serialized["name"], | ||
| "input_str": input_str, | ||
| "output_str": "", | ||
| "status": Status.agent_action, | ||
| "run_id": run_id.hex, | ||
| "llm_token": "", | ||
| "final_answer": "", | ||
| "error": "", | ||
| } | ||
| self.queue.put_nowait(dumps(self.cur_tool)) | ||
|
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| async def on_tool_end(self, output: str, *, run_id: UUID, parent_run_id: UUID | None = None, | ||
| tags: List[str] | None = None, **kwargs: Any) -> None: | ||
| self.out = True | ||
| self.cur_tool.update( | ||
| status=Status.agent_finish, | ||
| output_str=output.replace("Answer:", ""), | ||
| ) | ||
| self.queue.put_nowait(dumps(self.cur_tool)) | ||
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| async def on_tool_error(self, error: Exception | KeyboardInterrupt, *, run_id: UUID, | ||
| parent_run_id: UUID | None = None, tags: List[str] | None = None, **kwargs: Any) -> None: | ||
| self.out = True | ||
| self.cur_tool.update( | ||
| status=Status.error, | ||
| error=str(error), | ||
| ) | ||
| self.queue.put_nowait(dumps(self.cur_tool)) | ||
|
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| async def on_llm_new_token(self, token: str, **kwargs: Any) -> None: | ||
| if token: | ||
| if token == "Action": | ||
| self.out = False | ||
| self.cur_tool.update( | ||
| status=Status.running, | ||
| llm_token="\n\n", | ||
| ) | ||
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||
| if self.out: | ||
| self.cur_tool.update( | ||
| status=Status.running, | ||
| llm_token=token, | ||
| ) | ||
| self.queue.put_nowait(dumps(self.cur_tool)) | ||
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| async def on_llm_start(self, serialized: Dict[str, Any], prompts: List[str], **kwargs: Any) -> None: | ||
| self.cur_tool.update( | ||
| status=Status.start, | ||
| llm_token="", | ||
| ) | ||
| self.queue.put_nowait(dumps(self.cur_tool)) | ||
|
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| async def on_llm_end(self, response: LLMResult, **kwargs: Any) -> None: | ||
| self.out = True | ||
| self.cur_tool.update( | ||
| status=Status.complete, | ||
| llm_token="", | ||
| ) | ||
| self.queue.put_nowait(dumps(self.cur_tool)) | ||
|
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| async def on_llm_error(self, error: Exception | KeyboardInterrupt, **kwargs: Any) -> None: | ||
| self.cur_tool.update( | ||
| status=Status.error, | ||
| error=str(error), | ||
| ) | ||
| self.queue.put_nowait(dumps(self.cur_tool)) | ||
|
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| async def on_agent_finish( | ||
| self, finish: AgentFinish, *, run_id: UUID, parent_run_id: Optional[UUID] = None, | ||
| tags: Optional[List[str]] = None, | ||
| **kwargs: Any, | ||
| ) -> None: | ||
| self.cur_tool = {} |
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