from __future__ import annotations import json from aiohttp import ClientSession, BaseConnector from ..typing import AsyncResult, Messages from .base_provider import AsyncGeneratorProvider, ProviderModelMixin from .helper import get_connector from ..errors import RateLimitError, ModelNotFoundError from ..requests.raise_for_status import raise_for_status class HuggingFace(AsyncGeneratorProvider, ProviderModelMixin): url = "https://huggingface.co/chat" working = True supports_message_history = True default_model = "mistralai/Mixtral-8x7B-Instruct-v0.1" @classmethod async def create_async_generator( cls, model: str, messages: Messages, stream: bool = True, proxy: str = None, connector: BaseConnector = None, api_base: str = "https://api-inference.huggingface.co", api_key: str = None, max_new_tokens: int = 1024, temperature: float = 0.7, **kwargs ) -> AsyncResult: model = cls.get_model(model) headers = {} if api_key is not None: headers["Authorization"] = f"Bearer {api_key}" params = { "return_full_text": False, "max_new_tokens": max_new_tokens, "temperature": temperature, **kwargs } payload = {"inputs": format_prompt(messages), "parameters": params, "stream": stream} async with ClientSession( headers=headers, connector=get_connector(connector, proxy) ) as session: async with session.post(f"{api_base.rstrip('/')}/models/{model}", json=payload) as response: if response.status == 404: raise ModelNotFoundError(f"Model is not supported: {model}") await raise_for_status(response) if stream: first = True async for line in response.content: if line.startswith(b"data:"): data = json.loads(line[5:]) if not data["token"]["special"]: chunk = data["token"]["text"] if first: first = False chunk = chunk.lstrip() yield chunk else: yield (await response.json())[0]["generated_text"].strip() def format_prompt(messages: Messages) -> str: system_messages = [message["content"] for message in messages if message["role"] == "system"] question = " ".join([messages[-1]["content"], *system_messages]) history = "".join([ f"[INST]{messages[idx-1]['content']} [/INST] {message['content']}" for idx, message in enumerate(messages) if message["role"] == "assistant" ]) return f"{history}[INST] {question} [/INST]"