Instructor - 可观测性与 Tracing

%pip install langfuse openai pydantic instructor --upgrade

import os
 
# Get keys for your project from the project settings page: https://litefuse.cloud
os.environ["LANGFUSE_PUBLIC_KEY"] = "pk-lf-..." 
os.environ["LANGFUSE_SECRET_KEY"] = "sk-lf-..." 
os.environ["LANGFUSE_BASE_URL"] = "https://litefuse.cloud"
 
# Your openai key
os.environ["OPENAI_API_KEY"] = "sk-proj-..."

import instructor
from langfuse.openai import OpenAI
from pydantic import BaseModel
 
# Patch Langfuse wrapper of synchronous OpenAI client with instructor
client = instructor.patch(OpenAI())
 
class WeatherDetail(BaseModel):
    city: str
    temperature: int
 
# Run synchronous OpenAI client
weather_info = client.chat.completions.create(
    model="gpt-4o",
    response_model=WeatherDetail,
    messages=[
        {"role": "user", "content": "The weather in Paris is 18 degrees Celsius."},
    ],
)
 
print(weather_info.model_dump_json(indent=2))
"""
{
  "city": "Paris",
  "temperature": 18
}
"""

import instructor
from langfuse.openai import AsyncOpenAI
from pydantic import BaseModel
 
# Patch Langfuse wrapper of synchronous OpenAI client with instructor
client = instructor.apatch(AsyncOpenAI())
 
class WeatherDetail(BaseModel):
    city: str
    temperature: int
 
# Run asynchronous OpenAI client
task = client.chat.completions.create(
    model="gpt-4o",
    response_model=WeatherDetail,
    messages=[
        {"role": "user", "content": "The weather in Paris is 18 degrees Celsius."},
    ],
)
 
response = await task
print(response.model_dump_json(indent=2))
"""
{
  "city": "Paris",
  "temperature": 18
}
"""

from typing import List, Tuple
from enum import Enum
 
import asyncio
import instructor
 
from langfuse.openai import AsyncOpenAI
from langfuse import observe, get_client
 
from pydantic import BaseModel, Field, field_validator
 
# Initialize Langfuse wrapper of AsyncOpenAI client
client = AsyncOpenAI()
 
# Patch the client with Instructor
client = instructor.patch(client, mode=instructor.Mode.TOOLS)
 
# Initialize Langfuse (needed for scoring)
langfuse = get_client()
 
# Rate limit the number of requests
sem = asyncio.Semaphore(5)
 
# Define feedback categories
class FeedbackType(Enum):
    PRAISE = "PRAISE"
    SUGGESTION = "SUGGESTION"
    BUG = "BUG"
    QUESTION = "QUESTION"
 
# Model for feedback classification
class FeedbackClassification(BaseModel):
    feedback_text: str = Field(...)
    classification: List[FeedbackType] = Field(description="Predicted categories for the feedback")
    relevance_score: float = Field(
        default=0.0,
        description="Score of the query evaluating its relevance to the business between 0.0 and 1.0"
    )
 
    # Make sure feedback type is list
    @field_validator("classification", mode="before")
    def validate_classification(cls, v):
        if not isinstance(v, list):
            v = [v]
        return v
 
@observe() # Langfuse decorator to automatically log spans to Litefuse
async def classify_feedback(feedback: str) -> Tuple[FeedbackClassification, float]:
    """
    Classify customer feedback into categories and evaluate relevance.
    """
    async with sem:  # simple rate limiting
        response = await client.chat.completions.create(
            model="gpt-4o",
            response_model=FeedbackClassification,
            max_retries=2,
            messages=[
                {
                    "role": "user",
                    "content": f"Classify and score this feedback: {feedback}",
                },
            ],
        )
 
        # Retrieve observation_id of current span
        observation_id = langfuse.get_current_observation_id()
 
        return feedback, response, observation_id
 
def score_relevance(trace_id: str, observation_id: str, relevance_score: float):
    """
    Score the relevance of a feedback query in Litefuse given the observation_id.
    """
    langfuse.create_score(
        trace_id=trace_id,
        observation_id=observation_id,
        name="feedback-relevance",
        value=relevance_score
    )
 
@observe() # Langfuse decorator to automatically log trace to Litefuse
async def main(feedbacks: List[str]):
    tasks = [classify_feedback(feedback) for feedback in feedbacks]
    results = []
 
    for task in asyncio.as_completed(tasks):
        feedback, classification, observation_id = await task
        result = {
            "feedback": feedback,
            "classification": [c.value for c in classification.classification],
            "relevance_score": classification.relevance_score,
        }
        results.append(result)
 
        # Retrieve trace_id of current trace
        trace_id = langfuse.get_current_trace_id()
 
        # Score the relevance of the feedback in Litefuse
        score_relevance(trace_id, observation_id, classification.relevance_score)
 
    # Flush observations to Litefuse
    langfuse.flush()
    return results
 
feedback_messages = [
    "The chat bot on your website does not work.",
    "Your customer service is exceptional!",
    "Could you add more features to your app?",
    "I have a question about my recent order.",
]
 
feedback_classifications = await main(feedback_messages)
 
for classification in feedback_classifications:
    print(f"Feedback: {classification['feedback']}")
    print(f"Classification: {classification['classification']}")
    print(f"Relevance Score: {classification['relevance_score']}")
 
"""
Feedback: I have a question about my recent order.
Classification: ['QUESTION']
Relevance Score: 0.0
Feedback: Could you add more features to your app?
Classification: ['SUGGESTION']
Relevance Score: 0.0
Feedback: The chat bot on your website does not work.
Classification: ['BUG']
Relevance Score: 0.9
Feedback: Your customer service is exceptional!
Classification: ['PRAISE']
Relevance Score: 0.9
"""