77 lines
2.9 KiB
Python
77 lines
2.9 KiB
Python
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# coding=utf-8
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"""
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@project: maxkb
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@Author：虎
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@file： llm.py
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@date：2023/11/10 17:45
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@desc:
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"""
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from typing import List, Dict, Optional, Any, Iterator
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from langchain_community.chat_models.baidu_qianfan_endpoint import _convert_dict_to_message, QianfanChatEndpoint
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from langchain_core.callbacks import CallbackManagerForLLMRun
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from langchain_core.messages import (
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AIMessageChunk,
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BaseMessage,
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)
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from langchain_core.outputs import ChatGenerationChunk
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from models_provider.base_model_provider import MaxKBBaseModel
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class QianfanChatModel(MaxKBBaseModel, QianfanChatEndpoint):
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@staticmethod
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def is_cache_model():
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return False
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@staticmethod
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def new_instance(model_type, model_name, model_credential: Dict[str, object], **model_kwargs):
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optional_params = MaxKBBaseModel.filter_optional_params(model_kwargs)
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return QianfanChatModel(model=model_name,
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qianfan_ak=model_credential.get('api_key'),
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qianfan_sk=model_credential.get('secret_key'),
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streaming=model_kwargs.get('streaming', False),
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init_kwargs=optional_params)
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usage_metadata: dict = {}
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def get_last_generation_info(self) -> Optional[Dict[str, Any]]:
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return self.usage_metadata
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def get_num_tokens_from_messages(self, messages: List[BaseMessage]) -> int:
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return self.usage_metadata.get('prompt_tokens', 0)
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def get_num_tokens(self, text: str) -> int:
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return self.usage_metadata.get('completion_tokens', 0)
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def _stream(
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self,
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messages: List[BaseMessage],
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stop: Optional[List[str]] = None,
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run_manager: Optional[CallbackManagerForLLMRun] = None,
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**kwargs: Any,
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) -> Iterator[ChatGenerationChunk]:
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kwargs = {**self.init_kwargs, **kwargs}
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params = self._convert_prompt_msg_params(messages, **kwargs)
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params["stop"] = stop
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params["stream"] = True
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for res in self.client.do(**params):
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if res:
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msg = _convert_dict_to_message(res)
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additional_kwargs = msg.additional_kwargs.get("function_call", {})
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if msg.content == "" or res.get("body").get("is_end"):
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token_usage = res.get("body").get("usage")
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self.usage_metadata = token_usage
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chunk = ChatGenerationChunk(
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text=res["result"],
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message=AIMessageChunk( # type: ignore[call-arg]
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content=msg.content,
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role="assistant",
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additional_kwargs=additional_kwargs,
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),
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generation_info=msg.additional_kwargs,
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)
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if run_manager:
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run_manager.on_llm_new_token(chunk.text, chunk=chunk)
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yield chunk
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