mirror of
https://github.com/hwchase17/langchain
synced 2024-11-06 03:20:49 +00:00
97 lines
3.2 KiB
Python
97 lines
3.2 KiB
Python
"""Wrapper around Minimax chat models."""
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import logging
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from typing import Any, Dict, List, Optional, cast
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from langchain_core.callbacks import (
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AsyncCallbackManagerForLLMRun,
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CallbackManagerForLLMRun,
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)
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from langchain_core.language_models.chat_models import BaseChatModel
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from langchain_core.messages import (
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AIMessage,
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BaseMessage,
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HumanMessage,
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)
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from langchain_core.outputs import ChatGeneration, ChatResult
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from langchain_community.llms.minimax import MinimaxCommon
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from langchain_community.llms.utils import enforce_stop_tokens
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logger = logging.getLogger(__name__)
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def _parse_message(msg_type: str, text: str) -> Dict:
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return {"sender_type": msg_type, "text": text}
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def _parse_chat_history(history: List[BaseMessage]) -> List:
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"""Parse a sequence of messages into history."""
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chat_history = []
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for message in history:
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content = cast(str, message.content)
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if isinstance(message, HumanMessage):
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chat_history.append(_parse_message("USER", content))
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if isinstance(message, AIMessage):
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chat_history.append(_parse_message("BOT", content))
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return chat_history
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class MiniMaxChat(MinimaxCommon, BaseChatModel):
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"""MiniMax large language models.
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To use, you should have the environment variable ``MINIMAX_GROUP_ID`` and
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``MINIMAX_API_KEY`` set with your API token, or pass it as a named parameter to
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the constructor.
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Example:
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.. code-block:: python
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from langchain_community.chat_models import MiniMaxChat
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llm = MiniMaxChat(model_name="abab5-chat")
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"""
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def _generate(
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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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) -> ChatResult:
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"""Generate next turn in the conversation.
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Args:
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messages: The history of the conversation as a list of messages. Code chat
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does not support context.
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stop: The list of stop words (optional).
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run_manager: The CallbackManager for LLM run, it's not used at the moment.
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Returns:
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The ChatResult that contains outputs generated by the model.
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Raises:
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ValueError: if the last message in the list is not from human.
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"""
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if not messages:
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raise ValueError(
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"You should provide at least one message to start the chat!"
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)
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history = _parse_chat_history(messages)
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payload = self._default_params
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payload["messages"] = history
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text = self._client.post(payload)
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# This is required since the stop are not enforced by the model parameters
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text = text if stop is None else enforce_stop_tokens(text, stop)
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return ChatResult(generations=[ChatGeneration(message=AIMessage(text))])
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async def _agenerate(
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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[AsyncCallbackManagerForLLMRun] = None,
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**kwargs: Any,
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) -> ChatResult:
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raise NotImplementedError(
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"""Minimax AI doesn't support async requests at the moment."""
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)
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