Fiddler 是企业生成式和预测式系统运营的先驱，提供了一个统一平台，使数据科学、MLOps、风险、合规、分析和其他业务线团队能够监控、解释、分析和改进企业规模的 ML 部署。

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1. 安装和设置

#!pip install langchain langchain-community langchain-openai fiddler-client

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2. Fiddler 连接详情

在使用 Fiddler 添加模型信息之前
  1. 您用于连接到 Fiddler 的 URL
  2. 您的组织 ID
  3. 您的授权令牌
这些可以通过导航到 Fiddler 环境的设置页面找到。 
URL = ""  # Your Fiddler instance URL, Make sure to include the full URL (including https://). For example: https://demo.fiddler.ai
ORG_NAME = ""
AUTH_TOKEN = ""  # Your Fiddler instance auth token

# Fiddler project and model names, used for model registration
PROJECT_NAME = ""
MODEL_NAME = ""  # Model name in Fiddler

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3. 创建 fiddler 回调处理程序实例

from langchain_community.callbacks.fiddler_callback import FiddlerCallbackHandler

fiddler_handler = FiddlerCallbackHandler(
    url=URL,
    org=ORG_NAME,
    project=PROJECT_NAME,
    model=MODEL_NAME,
    api_key=AUTH_TOKEN,
)

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示例 1：基本链

from langchain_core.output_parsers import StrOutputParser
from langchain_openai import OpenAI

# 注意：确保在环境变量 OPENAI_API_KEY 中设置了 openai API 密钥
llm = OpenAI(temperature=0, streaming=True, callbacks=[fiddler_handler])
output_parser = StrOutputParser()

chain = llm | output_parser

# 调用链。调用将被记录到 Fiddler，并自动生成指标
chain.invoke("How far is moon from earth?")

# Few more invocations
chain.invoke("What is the temperature on Mars?")
chain.invoke("How much is 2 + 200000?")
chain.invoke("Which movie won the oscars this year?")
chain.invoke("Can you write me a poem about insomnia?")
chain.invoke("How are you doing today?")
chain.invoke("What is the meaning of life?")

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示例 2：带提示模板的链

from langchain_core.prompts import (
    ChatPromptTemplate,
    FewShotChatMessagePromptTemplate,
)

examples = [
    {"input": "2+2", "output": "4"},
    {"input": "2+3", "output": "5"},
]

example_prompt = ChatPromptTemplate.from_messages(
    [
        ("human", "{input}"),
        ("ai", "{output}"),
    ]
)

few_shot_prompt = FewShotChatMessagePromptTemplate(
    example_prompt=example_prompt,
    examples=examples,
)

final_prompt = ChatPromptTemplate.from_messages(
    [
        ("system", "You are a wondrous wizard of math."),
        few_shot_prompt,
        ("human", "{input}"),
    ]
)

# 注意：确保在环境变量 OPENAI_API_KEY 中设置了 openai API 密钥
llm = OpenAI(temperature=0, streaming=True, callbacks=[fiddler_handler])

chain = final_prompt | llm

# 调用链。调用将被记录到 Fiddler，并自动生成指标
chain.invoke({"input": "What's the square of a triangle?"})
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