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ChatSambaNovaCloud

这将帮助您入门 SambaNovaCloud 聊天模型。有关 ChatSambaNovaCloud 功能和配置的详细文档，请参阅 API 参考。

SambaNova 的 SambaNova Cloud 是一个用于使用开源模型进行推理的平台。

概述​

集成详情​

ClassPackageLocalSerializableJS supportPackage downloadsPackage latest
ChatSambaNovaCloudlangchain-sambanova❌❌❌PyPI - DownloadsPyPI - Version

模型特性​

工具调用结构化输出JSON 模式图像输入音频输入视频输入Token 流式传输原生异步Token 使用情况Logprobs
✅✅✅✅✅❌✅✅✅❌

设置​

要访问 ChatSambaNovaCloud 模型，您需要创建一个 SambaNovaCloud 账户，获取一个 API 密钥，并安装 langchain_sambanova 集成包。

pip install langchain-sambanova

凭据​

从 cloud.sambanova.ai 获取 API 密钥，并将其添加到您的环境变量中：

export SAMBANOVA_API_KEY="your-api-key-here"
import getpass
import os

if not os.getenv("SAMBANOVA_API_KEY"):
    os.environ["SAMBANOVA_API_KEY"] = getpass.getpass(
        "Enter your SambaNova Cloud API key: "
    )

如果你想自动跟踪模型调用，也可以通过取消注释以下内容来设置你的 LangSmith API 密钥：

# os.environ["LANGSMITH_TRACING"] = "true"
# os.environ["LANGSMITH_API_KEY"] = getpass.getpass("Enter your LangSmith API key: ")

安装​

LangChain SambaNovaCloud 集成位于 langchain_sambanova 包中：

%pip install -qU langchain-sambanova

例化​

现在我们可以例化我们的模型对象并生成聊天补全：

from langchain_sambanova import ChatSambaNovaCloud

llm = ChatSambaNovaCloud(
    model="Meta-Llama-3.3-70B-Instruct",
    max_tokens=1024,
    temperature=0.7,
    top_p=0.01,
)

调用​

messages = [
    (
        "system",
        "You are a helpful assistant that translates English to French. "
        "Translate the user sentence.",
    ),
    ("human", "I love programming."),
]
ai_msg = llm.invoke(messages)
ai_msg
AIMessage(content="J'adore la programmation.", additional_kwargs={}, response_metadata={'finish_reason': 'stop', 'usage': {'acceptance_rate': 7, 'completion_tokens': 8, 'completion_tokens_after_first_per_sec': 195.0204119588971, 'completion_tokens_after_first_per_sec_first_ten': 618.3422770734173, 'completion_tokens_per_sec': 53.25837044790076, 'end_time': 1731535338.1864908, 'is_last_response': True, 'prompt_tokens': 55, 'start_time': 1731535338.0133238, 'time_to_first_token': 0.13727331161499023, 'total_latency': 0.15021112986973353, 'total_tokens': 63, 'total_tokens_per_sec': 419.4096672772185}, 'model_name': 'Meta-Llama-3.1-70B-Instruct', 'system_fingerprint': 'fastcoe', 'created': 1731535338}, id='f04b7c2c-bc46-47e0-9c6b-19a002e8f390')
print(ai_msg.content)
J'adore la programmation.

链式调用​

我们可以像这样将我们的模型与一个提示模板结合起来：

from langchain_core.prompts import ChatPromptTemplate

prompt = ChatPromptTemplate(
    [
        (
            "system",
            "You are a helpful assistant that translates {input_language} "
            "to {output_language}.",
        ),
        ("human", "{input}"),
    ]
)

chain = prompt | llm
chain.invoke(
    {
        "input_language": "English",
        "output_language": "German",
        "input": "I love programming.",
    }
)
API Reference:ChatPromptTemplate
AIMessage(content='Ich liebe das Programmieren.', additional_kwargs={}, response_metadata={'finish_reason': 'stop', 'usage': {'acceptance_rate': 2.3333333333333335, 'completion_tokens': 6, 'completion_tokens_after_first_per_sec': 106.06729752831038, 'completion_tokens_after_first_per_sec_first_ten': 204.92722183833433, 'completion_tokens_per_sec': 26.32497272023831, 'end_time': 1731535339.9997504, 'is_last_response': True, 'prompt_tokens': 50, 'start_time': 1731535339.7539687, 'time_to_first_token': 0.19864177703857422, 'total_latency': 0.22792046410696848, 'total_tokens': 56, 'total_tokens_per_sec': 245.6997453888909}, 'model_name': 'Meta-Llama-3.1-70B-Instruct', 'system_fingerprint': 'fastcoe', 'created': 1731535339}, id='dfe0bee6-b297-472e-ac9d-29906d162dcb')

流式传输​

system = "You are a helpful assistant with pirate accent."
human = "I want to learn more about this animal: {animal}"
prompt = ChatPromptTemplate.from_messages([("system", system), ("human", human)])

chain = prompt | llm

for chunk in chain.stream({"animal": "owl"}):
    print(chunk.content, end="", flush=True)
Yer lookin' fer some knowledge about owls, eh? Alright then, matey, settle yerself down with a pint o' grog and listen close. 

Owls be a fascinatin' lot, with their big round eyes and silent wings. They be birds o' prey, which means they hunt other creatures fer food. There be over 220 species o' owls, rangin' in size from the tiny Elf Owl (which be smaller than a parrot) to the Great Grey Owl (which be as big as a small eagle).

One o' the most interestin' things about owls be their eyes. They be huge, with some species havin' eyes that be as big as their brains! This lets 'em see in the dark, which be perfect fer nocturnal huntin'. They also have special feathers on their faces that help 'em hear better, and their ears be specially designed to pinpoint sounds.

Owls be known fer their silent flight, which be due to the special shape o' their wings. They be able to fly without makin' a sound, which be perfect fer sneakin' up on prey. They also be very agile, with some species able to fly through tight spaces and make sharp turns.

Some o' the most common species o' owls include:

* Barn Owl: A medium-sized owl with a heart-shaped face and a screechin' call.
* Tawny Owl: A large owl with a distinctive hootin' call and a reddish-brown plumage.
* Great Horned Owl: A big owl with ear tufts and a deep hootin' call.
* Snowy Owl: A white owl with a round face and a soft, hootin' call.

Owls be found all over the world, in a variety o' habitats, from forests to deserts. They be an important part o' many ecosystems, helpin' to keep populations o' small mammals and birds under control.

So there ye have it, matey! Owls be amazin' creatures, with their big eyes, silent wings, and sharp talons. Now go forth and spread the word about these fascinatin' birds!

异步​

prompt = ChatPromptTemplate.from_messages(
    [
        (
            "human",
            "what is the capital of {country}?",
        )
    ]
)

chain = prompt | llm
await chain.ainvoke({"country": "France"})
AIMessage(content='The capital of France is Paris.', additional_kwargs={}, response_metadata={'finish_reason': 'stop', 'usage': {'acceptance_rate': 1, 'completion_tokens': 7, 'completion_tokens_after_first_per_sec': 442.126212227688, 'completion_tokens_after_first_per_sec_first_ten': 0, 'completion_tokens_per_sec': 46.28540439646366, 'end_time': 1731535343.0321083, 'is_last_response': True, 'prompt_tokens': 42, 'start_time': 1731535342.8808727, 'time_to_first_token': 0.137664794921875, 'total_latency': 0.15123558044433594, 'total_tokens': 49, 'total_tokens_per_sec': 323.99783077524563}, 'model_name': 'Meta-Llama-3.1-70B-Instruct', 'system_fingerprint': 'fastcoe', 'created': 1731535342}, id='c4b8c714-df38-4206-9aa8-fc8231f7275a')

异步流​

prompt = ChatPromptTemplate.from_messages(
    [
        (
            "human",
            "in less than {num_words} words explain me {topic} ",
        )
    ]
)
chain = prompt | llm

async for chunk in chain.astream({"num_words": 30, "topic": "quantum computers"}):
    print(chunk.content, end="", flush=True)
Quantum computers use quantum bits (qubits) to process info, leveraging superposition and entanglement to perform calculations exponentially faster than classical computers for certain complex problems.

函数调用​

from datetime import datetime

from langchain_core.messages import HumanMessage, ToolMessage
from langchain_core.tools import tool


@tool
def get_time(kind: str = "both") -> str:
    """Returns current date, current time or both.
    Args:
        kind(str): date, time or both
    Returns:
        str: current date, current time or both
    """
    if kind == "date":
        date = datetime.now().strftime("%m/%d/%Y")
        return f"Current date: {date}"
    elif kind == "time":
        time = datetime.now().strftime("%H:%M:%S")
        return f"Current time: {time}"
    else:
        date = datetime.now().strftime("%m/%d/%Y")
        time = datetime.now().strftime("%H:%M:%S")
        return f"Current date: {date}, Current time: {time}"


tools = [get_time]


def invoke_tools(tool_calls, messages):
    available_functions = {tool.name: tool for tool in tools}
    for tool_call in tool_calls:
        selected_tool = available_functions[tool_call["name"]]
        tool_output = selected_tool.invoke(tool_call["args"])
        print(f"Tool output: {tool_output}")
        messages.append(ToolMessage(tool_output, tool_call_id=tool_call["id"]))
    return messages
API Reference:HumanMessage | ToolMessage | tool
llm_with_tools = llm.bind_tools(tools=tools)
messages = [
    HumanMessage(
        content="I need to schedule a meeting for two weeks from today. "
        "Can you tell me the exact date of the meeting?"
    )
]
response = llm_with_tools.invoke(messages)
while len(response.tool_calls) > 0:
    print(f"Intermediate model response: {response.tool_calls}")
    messages.append(response)
    messages = invoke_tools(response.tool_calls, messages)
    response = llm_with_tools.invoke(messages)

print(f"final response: {response.content}")
Intermediate model response: [{'name': 'get_time', 'args': {'kind': 'date'}, 'id': 'call_7352ce7a18e24a7c9d', 'type': 'tool_call'}]
Tool output: Current date: 11/13/2024
final response: The meeting should be scheduled for two weeks from November 13th, 2024.

结构化输出​

from pydantic import BaseModel, Field


class Joke(BaseModel):
    """Joke to tell user."""

    setup: str = Field(description="The setup of the joke")
    punchline: str = Field(description="The punchline to the joke")


structured_llm = llm.with_structured_output(Joke)

structured_llm.invoke("Tell me a joke about cats")
Joke(setup='Why did the cat join a band?', punchline='Because it wanted to be the purr-cussionist!')

输入图片​

multimodal_llm = ChatSambaNovaCloud(
    model="Llama-3.2-11B-Vision-Instruct",
    max_tokens=1024,
    temperature=0.7,
    top_p=0.01,
)
import base64

import httpx

image_url = (
    "https://images.pexels.com/photos/147411/italy-mountains-dawn-daybreak-147411.jpeg"
)
image_data = base64.b64encode(httpx.get(image_url).content).decode("utf-8")

message = HumanMessage(
    content=[
        {"type": "text", "text": "describe the weather in this image in 1 sentence"},
        {
            "type": "image_url",
            "image_url": {"url": f"data:image/jpeg;base64,{image_data}"},
        },
    ],
)
response = multimodal_llm.invoke([message])
print(response.content)
The weather in this image is a serene and peaceful atmosphere, with a blue sky and white clouds, suggesting a pleasant day with mild temperatures and gentle breezes.

API 参考​

有关所有 SambaNovaCloud 功能和配置的详细文档，请访问 API 参考：https://docs.sambanova.ai/cloud/docs/get-started/overview