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DeepInfra

DeepInfra 是一种无服务器推理即服务，提供对各种LLMs和嵌入模型的访问。本笔记本介绍了如何将LangChain与DeepInfra结合使用以进行语言模型。

设置环境API密钥​

确保从DeepInfra获取您的API密钥。您需要登录并获取一个新的令牌。

您将获得1小时的无服务器GPU计算时间，用于测试不同的模型。（参见这里） 您可以使用deepctl auth token打印您的令牌

# get a new token: https://deepinfra.com/login?from=%2Fdash

from getpass import getpass

DEEPINFRA_API_TOKEN = getpass()
 ········
import os

os.environ["DEEPINFRA_API_TOKEN"] = DEEPINFRA_API_TOKEN

创建 DeepInfra 实例​

你也可以使用我们开源的deepctl工具来管理你的模型部署。你可以查看可用参数的列表这里。

from langchain_community.llms import DeepInfra

llm = DeepInfra(model_id="meta-llama/Llama-2-70b-chat-hf")
llm.model_kwargs = {
    "temperature": 0.7,
    "repetition_penalty": 1.2,
    "max_new_tokens": 250,
    "top_p": 0.9,
}
API Reference:DeepInfra
# run inferences directly via wrapper
llm("Who let the dogs out?")
'This is a question that has puzzled many people'
# run streaming inference
for chunk in llm.stream("Who let the dogs out?"):
    print(chunk)
 Will
 Smith
.

创建一个提示模板​

我们将为问答创建一个提示模板。

from langchain_core.prompts import PromptTemplate

template = """Question: {question}

Answer: Let's think step by step."""

prompt = PromptTemplate.from_template(template)
API Reference:PromptTemplate

启动LLMChain​

from langchain.chains import LLMChain

llm_chain = LLMChain(prompt=prompt, llm=llm)
API Reference:LLMChain

运行LLMChain​

提供一个问题并运行LLMChain。

question = "Can penguins reach the North pole?"

llm_chain.run(question)
"Penguins are found in Antarctica and the surrounding islands, which are located at the southernmost tip of the planet. The North Pole is located at the northernmost tip of the planet, and it would be a long journey for penguins to get there. In fact, penguins don't have the ability to fly or migrate over such long distances. So, no, penguins cannot reach the North Pole. "

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