mirror of
https://github.com/hwchase17/langchain
synced 2024-11-02 09:40:22 +00:00
139 lines
4.5 KiB
Python
139 lines
4.5 KiB
Python
from typing import Any, Dict, List, Optional
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import requests
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from langchain_core.callbacks import CallbackManagerForLLMRun
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from langchain_core.language_models import LLM
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from langchain_core.pydantic_v1 import BaseModel, Field, SecretStr, root_validator
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from langchain_core.utils import convert_to_secret_str, get_from_dict_or_env
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from langchain_community.llms.utils import enforce_stop_tokens
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MOONSHOT_SERVICE_URL_BASE = "https://api.moonshot.cn/v1"
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class _MoonshotClient(BaseModel):
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"""An API client that talks to the Moonshot server."""
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api_key: SecretStr
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"""The API key to use for authentication."""
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base_url: str = MOONSHOT_SERVICE_URL_BASE
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def completion(self, request: Any) -> Any:
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headers = {"Authorization": f"Bearer {self.api_key.get_secret_value()}"}
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response = requests.post(
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f"{self.base_url}/chat/completions",
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headers=headers,
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json=request,
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)
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if not response.ok:
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raise ValueError(f"HTTP {response.status_code} error: {response.text}")
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return response.json()["choices"][0]["message"]["content"]
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class MoonshotCommon(BaseModel):
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"""Common parameters for Moonshot LLMs."""
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_client: _MoonshotClient
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base_url: str = MOONSHOT_SERVICE_URL_BASE
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moonshot_api_key: Optional[SecretStr] = Field(default=None, alias="api_key")
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"""Moonshot API key. Get it here: https://platform.moonshot.cn/console/api-keys"""
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model_name: str = Field(default="moonshot-v1-8k", alias="model")
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"""Model name. Available models listed here: https://platform.moonshot.cn/pricing"""
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max_tokens = 1024
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"""Maximum number of tokens to generate."""
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temperature = 0.3
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"""Temperature parameter (higher values make the model more creative)."""
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class Config:
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"""Configuration for this pydantic object."""
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allow_population_by_field_name = True
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@property
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def lc_secrets(self) -> dict:
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"""A map of constructor argument names to secret ids.
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For example,
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{"moonshot_api_key": "MOONSHOT_API_KEY"}
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"""
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return {"moonshot_api_key": "MOONSHOT_API_KEY"}
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@property
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def _default_params(self) -> Dict[str, Any]:
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"""Get the default parameters for calling OpenAI API."""
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return {
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"model": self.model_name,
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"max_tokens": self.max_tokens,
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"temperature": self.temperature,
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}
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@property
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def _invocation_params(self) -> Dict[str, Any]:
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return {**{"model": self.model_name}, **self._default_params}
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@root_validator(pre=True)
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def build_extra(cls, values: Dict[str, Any]) -> Dict[str, Any]:
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"""Build extra parameters.
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Override the superclass method, prevent the model parameter from being
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overridden.
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"""
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return values
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@root_validator()
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def validate_environment(cls, values: Dict) -> Dict:
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"""Validate that api key and python package exists in environment."""
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values["moonshot_api_key"] = convert_to_secret_str(
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get_from_dict_or_env(values, "moonshot_api_key", "MOONSHOT_API_KEY")
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)
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values["_client"] = _MoonshotClient(
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api_key=values["moonshot_api_key"],
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base_url=values["base_url"]
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if "base_url" in values
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else MOONSHOT_SERVICE_URL_BASE,
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)
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return values
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@property
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def _llm_type(self) -> str:
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"""Return type of llm."""
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return "moonshot"
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class Moonshot(MoonshotCommon, LLM):
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"""Moonshot large language models.
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To use, you should have the environment variable ``MOONSHOT_API_KEY`` set with your
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API key. Referenced from https://platform.moonshot.cn/docs
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Example:
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.. code-block:: python
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from langchain_community.llms.moonshot import Moonshot
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moonshot = Moonshot(model="moonshot-v1-8k")
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"""
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class Config:
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"""Configuration for this pydantic object."""
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allow_population_by_field_name = True
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def _call(
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self,
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prompt: str,
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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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) -> str:
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request = self._invocation_params
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request["messages"] = [{"role": "user", "content": prompt}]
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request.update(kwargs)
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text = self._client.completion(request)
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if stop is not None:
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# This is required since the stop tokens
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# are not enforced by the model parameters
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text = enforce_stop_tokens(text, stop)
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return text
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