IBM watsonx.ai
WatsonxLLM 是 IBM watsonx.ai 基础模型的包装器。
此示例展示了如何使用 LangChain
与 watsonx.ai
模型进行通信。
概述
集成详情
类 | 包 | 本地 | 可序列化 | JS 支持 | 包下载 | 包最新 |
---|---|---|---|---|---|---|
WatsonxLLM | langchain-ibm | ❌ | ❌ | ✅ |
设置
要访问 IBM watsonx.ai 模型,您需要创建一个 IBM watsonx.ai 帐户,获取 API 密钥,并安装 langchain-ibm
集成包。
凭证
以下单元格定义了使用 watsonx 基础模型推理所需的凭证。
操作: 提供 IBM Cloud 用户 API 密钥。有关详细信息,请参阅 管理用户 API 密钥。
import os
from getpass import getpass
watsonx_api_key = getpass()
os.environ["WATSONX_APIKEY"] = watsonx_api_key
此外,您可以将其他密钥作为环境变量传递。
import os
os.environ["WATSONX_URL"] = "your service instance url"
os.environ["WATSONX_TOKEN"] = "your token for accessing the CPD cluster"
os.environ["WATSONX_PASSWORD"] = "your password for accessing the CPD cluster"
os.environ["WATSONX_USERNAME"] = "your username for accessing the CPD cluster"
os.environ["WATSONX_INSTANCE_ID"] = "your instance_id for accessing the CPD cluster"
安装
LangChain IBM 集成位于 langchain-ibm
包中
!pip install -qU langchain-ibm
实例化
您可能需要为不同的模型或任务调整模型 parameters
。有关详细信息,请参阅 文档。
parameters = {
"decoding_method": "sample",
"max_new_tokens": 100,
"min_new_tokens": 1,
"temperature": 0.5,
"top_k": 50,
"top_p": 1,
}
使用先前设置的参数初始化 WatsonxLLM
类。
注意:
在本示例中,我们将使用 project_id
和达拉斯 URL。
您需要指定将用于推理的 model_id
。您可以在 文档 中找到所有可用的模型。
from langchain_ibm import WatsonxLLM
watsonx_llm = WatsonxLLM(
model_id="ibm/granite-13b-instruct-v2",
url="https://us-south.ml.cloud.ibm.com",
project_id="PASTE YOUR PROJECT_ID HERE",
params=parameters,
)
或者,您可以使用 Cloud Pak for Data 凭证。有关详细信息,请参阅 文档。
watsonx_llm = WatsonxLLM(
model_id="ibm/granite-13b-instruct-v2",
url="PASTE YOUR URL HERE",
username="PASTE YOUR USERNAME HERE",
password="PASTE YOUR PASSWORD HERE",
instance_id="openshift",
version="4.8",
project_id="PASTE YOUR PROJECT_ID HERE",
params=parameters,
)
除了 model_id
之外,您还可以传递先前调整的模型的 deployment_id
。整个模型调整工作流程在 使用 TuneExperiment 和 PromptTuner 中进行了描述。
watsonx_llm = WatsonxLLM(
deployment_id="PASTE YOUR DEPLOYMENT_ID HERE",
url="https://us-south.ml.cloud.ibm.com",
project_id="PASTE YOUR PROJECT_ID HERE",
params=parameters,
)
对于某些要求,可以选择将 IBM 的 APIClient
对象传递到 WatsonxLLM
类中。
from ibm_watsonx_ai import APIClient
api_client = APIClient(...)
watsonx_llm = WatsonxLLM(
model_id="ibm/granite-13b-instruct-v2",
watsonx_client=api_client,
)
您还可以将 IBM 的 ModelInference
对象传递到 WatsonxLLM
类中。
from ibm_watsonx_ai.foundation_models import ModelInference
model = ModelInference(...)
watsonx_llm = WatsonxLLM(watsonx_model=model)
调用
要获取补全,您可以直接使用字符串提示调用模型。
# Calling a single prompt
watsonx_llm.invoke("Who is man's best friend?")
"Man's best friend is his dog. Dogs are man's best friend because they are always there for you, they never judge you, and they love you unconditionally. Dogs are also great companions and can help reduce stress levels. "
# Calling multiple prompts
watsonx_llm.generate(
[
"The fastest dog in the world?",
"Describe your chosen dog breed",
]
)
LLMResult(generations=[[Generation(text='The fastest dog in the world is the greyhound. Greyhounds can run up to 45 mph, which is about the same speed as a Usain Bolt.', generation_info={'finish_reason': 'eos_token'})], [Generation(text='The Labrador Retriever is a breed of retriever that was bred for hunting. They are a very smart breed and are very easy to train. They are also very loyal and will make great companions. ', generation_info={'finish_reason': 'eos_token'})]], llm_output={'token_usage': {'generated_token_count': 82, 'input_token_count': 13}, 'model_id': 'ibm/granite-13b-instruct-v2', 'deployment_id': None}, run=[RunInfo(run_id=UUID('750b8a0f-8846-456d-93d0-e039e95b1276')), RunInfo(run_id=UUID('aa4c2a1c-5b08-4fcf-87aa-50228de46db5'))], type='LLMResult')
流式传输模型输出
您可以流式传输模型输出。
for chunk in watsonx_llm.stream(
"Describe your favorite breed of dog and why it is your favorite."
):
print(chunk, end="")
My favorite breed of dog is a Labrador Retriever. They are my favorite breed because they are my favorite color, yellow. They are also very smart and easy to train.
链接
创建 PromptTemplate
对象,这些对象将负责创建随机问题。
from langchain_core.prompts import PromptTemplate
template = "Generate a random question about {topic}: Question: "
prompt = PromptTemplate.from_template(template)
提供一个主题并运行链。
llm_chain = prompt | watsonx_llm
topic = "dog"
llm_chain.invoke(topic)
'What is the origin of the name "Pomeranian"?'
API 参考
有关所有 WatsonxLLM
功能和配置的详细文档,请访问 API 参考。