Python SDK - Untrace

Overview

The Untrace Python SDK provides zero-latency LLM observability with automatic instrumentation for all major LLM providers. Built on OpenTelemetry standards, it captures comprehensive trace data and routes it to your chosen observability platforms.

Quick Start

Start tracing LLM calls in minutes

Framework Support

FastAPI, Django, Flask, and more

Async Support

Full async/await support

Examples

Real-world examples and best practices

Installation

Install the Untrace Python SDK using pip:

pip install untrace-sdk

pipenv install untrace-sdk

poetry add untrace-sdk

uv add untrace-sdk

Quick Start

Basic Setup

import asyncio
from untrace import UntraceClient

async def main():
    # Initialize the client
    async with UntraceClient(api_key="your-api-key") as client:
        # Send a trace event
        trace = await client.trace(
            event_type="llm_call",
            data={
                "model": "gpt-4",
                "prompt": "Hello, world!",
                "response": "Hello! How can I help you today?",
                "tokens_used": 25,
            },
            metadata={
                "user_id": "user123",
                "session_id": "session456",
            }
        )
        print(f"Trace created: {trace.id}")

# Run the async function
asyncio.run(main())

Synchronous Usage

from untrace import UntraceClient

# Initialize the client
client = UntraceClient(api_key="your-api-key")

# Send a trace event
trace = client.trace_sync(
    event_type="llm_call",
    data={
        "model": "gpt-4",
        "prompt": "Hello, world!",
        "response": "Hello! How can I help you today?",
    }
)

print(f"Trace created: {trace.id}")

# Don't forget to close the client
client.close()

Configuration

Client Options

from untrace import UntraceClient

client = UntraceClient(
    api_key="your-api-key",           # Required
    base_url="https://untrace.dev/api", # Optional, defaults to https://untrace.dev/api
    timeout=30.0,                     # Optional, defaults to 30 seconds
    max_retries=3,                    # Optional, defaults to 3
    retry_delay=1.0,                  # Optional, defaults to 1 second
)

Environment Variables

The SDK supports configuration via environment variables:

# Core settings
UNTRACE_API_KEY=your-api-key
UNTRACE_BASE_URL=https://untrace.dev/api
UNTRACE_DEBUG=true

# OpenTelemetry settings
OTEL_SERVICE_NAME=my-service
OTEL_RESOURCE_ATTRIBUTES=environment=production,version=1.0.0

Framework Integration

FastAPI

from fastapi import FastAPI, HTTPException
from untrace import UntraceClient
import asyncio

app = FastAPI()

# Initialize client
client = UntraceClient(api_key="your-api-key")

@app.on_event("startup")
async def startup_event():
    await client.__aenter__()

@app.on_event("shutdown")
async def shutdown_event():
    await client.__aexit__(None, None, None)

@app.post("/chat")
async def chat_endpoint(request: dict):
    try:
        trace = await client.trace(
            event_type="llm_call",
            data={
                "model": "gpt-4",
                "prompt": request["message"],
                "response": "Generated response",
                "tokens_used": 100,
            },
            metadata={
                "user_id": request.get("user_id"),
                "session_id": request.get("session_id"),
            }
        )

        return {
            "response": "Generated response",
            "trace_id": trace.id
        }
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e))

Django

# settings.py
UNTRACE_API_KEY = "your-api-key"
UNTRACE_BASE_URL = "https://untrace.dev/api"

# views.py
from django.http import JsonResponse
from django.views.decorators.csrf import csrf_exempt
from django.views.decorators.http import require_http_methods
from untrace import UntraceClient
import json

@csrf_exempt
@require_http_methods(["POST"])
def chat_view(request):
    try:
        data = json.loads(request.body)
        client = UntraceClient(api_key=settings.UNTRACE_API_KEY)

        trace = client.trace_sync(
            event_type="llm_call",
            data={
                "model": "gpt-4",
                "prompt": data["message"],
                "response": "Generated response",
            },
            metadata={
                "user_id": data.get("user_id"),
                "session_id": data.get("session_id"),
            }
        )

        return JsonResponse({
            "response": "Generated response",
            "trace_id": trace.id
        })
    except Exception as e:
        return JsonResponse({"error": str(e)}, status=500)
    finally:
        client.close()

Flask

from flask import Flask, request, jsonify
from untrace import UntraceClient

app = Flask(__name__)
client = UntraceClient(api_key="your-api-key")

@app.route("/chat", methods=["POST"])
def chat():
    try:
        data = request.get_json()

        trace = client.trace_sync(
            event_type="llm_call",
            data={
                "model": "gpt-4",
                "prompt": data["message"],
                "response": "Generated response",
            }
        )

        return jsonify({
            "response": "Generated response",
            "trace_id": trace.id
        })
    except Exception as e:
        return jsonify({"error": str(e)}), 500

@app.teardown_appcontext
def close_client(error):
    client.close()

Celery Integration

from celery import Celery
from untrace import UntraceClient

app = Celery('myapp')

@app.task
def process_llm_request(prompt, user_id):
    client = UntraceClient(api_key="your-api-key")

    try:
        # Your LLM processing logic here
        response = call_llm_api(prompt)

        # Trace the operation
        trace = client.trace_sync(
            event_type="llm_call",
            data={
                "model": "gpt-4",
                "prompt": prompt,
                "response": response,
            },
            metadata={
                "user_id": user_id,
                "task_id": process_llm_request.request.id,
            }
        )

        return {
            "response": response,
            "trace_id": trace.id
        }
    finally:
        client.close()

Advanced Usage

Custom Trace Attributes

from untrace import UntraceClient
from datetime import datetime

client = UntraceClient(api_key="your-api-key")

# Create a trace with custom attributes
trace = await client.trace(
    event_type="llm_call",
    data={
        "model": "gpt-4",
        "prompt": "What is the meaning of life?",
        "response": "42",
        "tokens_used": 50,
        "temperature": 0.7,
        "max_tokens": 100,
    },
    metadata={
        "user_id": "user123",
        "session_id": "session456",
        "timestamp": datetime.now().isoformat(),
        "custom_metric": 42.5,
        "feature_flag": "new_ui",
    }
)

Batch Tracing

from untrace import UntraceClient

client = UntraceClient(api_key="your-api-key")

# Send multiple traces in batch
traces = await client.trace_batch([
    {
        "event_type": "llm_call",
        "data": {"model": "gpt-4", "prompt": "Hello 1"},
    },
    {
        "event_type": "llm_call",
        "data": {"model": "gpt-4", "prompt": "Hello 2"},
    },
    {
        "event_type": "llm_call",
        "data": {"model": "gpt-4", "prompt": "Hello 3"},
    }
])

print(f"Created {len(traces)} traces")

Error Handling

from untrace import UntraceClient, UntraceAPIError, UntraceValidationError

client = UntraceClient(api_key="your-api-key")

try:
    trace = await client.trace(
        event_type="llm_call",
        data={"model": "gpt-4", "prompt": "Hello"}
    )
    print(f"Trace created: {trace.id}")

except UntraceValidationError as e:
    print(f"Validation error: {e}")

except UntraceAPIError as e:
    print(f"API error: {e}")

except Exception as e:
    print(f"Unexpected error: {e}")

Context Managers

from untrace import UntraceClient

# Using context manager for automatic cleanup
async with UntraceClient(api_key="your-api-key") as client:
    trace = await client.trace(
        event_type="llm_call",
        data={"model": "gpt-4", "prompt": "Hello"}
    )
    # Client is automatically closed when exiting the context

Decorators

The Python SDK provides decorators for easy instrumentation:

from untrace import trace, metric, error_handler
import asyncio

class LLMService:
    @trace(event_type="llm_call")
    async def call_llm(self, prompt: str, model: str = "gpt-4"):
        # Your LLM logic here
        return "Generated response"

    @metric(name="llm.latency", unit="ms")
    async def measure_latency(self, operation):
        # Your operation here
        pass

    @error_handler(re_raise=True)
    async def risky_operation(self):
        # Operation that might fail
        pass

Examples

OpenAI Integration

import openai
from untrace import UntraceClient

# Initialize OpenAI
openai.api_key = "your-openai-key"

# Initialize Untrace
client = UntraceClient(api_key="your-untrace-key")

async def chat_with_tracing(prompt: str):
    # Start tracing
    trace = await client.trace(
        event_type="llm_call",
        data={
            "model": "gpt-4",
            "prompt": prompt,
        }
    )

    try:
        # Make OpenAI API call
        response = await openai.ChatCompletion.acreate(
            model="gpt-4",
            messages=[{"role": "user", "content": prompt}],
            max_tokens=100,
            temperature=0.7
        )

        # Update trace with response
        await client.update_trace(trace.id, {
            "response": response.choices[0].message.content,
            "tokens_used": response.usage.total_tokens,
            "finish_reason": response.choices[0].finish_reason,
        })

        return response.choices[0].message.content

    except Exception as e:
        # Record error in trace
        await client.update_trace(trace.id, {
            "error": str(e),
            "error_type": type(e).__name__,
        })
        raise

LangChain Integration

from langchain.llms import OpenAI
from langchain.chains import ConversationChain
from untrace import UntraceClient

# Initialize LangChain
llm = OpenAI(temperature=0.7)
conversation = ConversationChain(llm=llm)

# Initialize Untrace
client = UntraceClient(api_key="your-untrace-key")

async def chat_with_langchain(prompt: str):
    trace = await client.trace(
        event_type="langchain_call",
        data={
            "model": "gpt-3.5-turbo",
            "prompt": prompt,
        }
    )

    try:
        # Run LangChain conversation
        response = conversation.predict(input=prompt)

        await client.update_trace(trace.id, {
            "response": response,
            "chain_type": "conversation",
        })

        return response

    except Exception as e:
        await client.update_trace(trace.id, {
            "error": str(e),
        })
        raise

Async Generator Support

from untrace import UntraceClient

client = UntraceClient(api_key="your-api-key")

async def stream_llm_response(prompt: str):
    trace = await client.trace(
        event_type="llm_stream",
        data={"model": "gpt-4", "prompt": prompt}
    )

    try:
        # Simulate streaming response
        async for chunk in stream_llm_api(prompt):
            yield chunk

        await client.update_trace(trace.id, {
            "status": "completed",
            "chunks_received": 10,
        })

    except Exception as e:
        await client.update_trace(trace.id, {
            "error": str(e),
            "status": "failed",
        })
        raise

Best Practices

1. Use Context Managers

# Good: Automatic cleanup
async with UntraceClient(api_key="your-api-key") as client:
    trace = await client.trace(...)

# Avoid: Manual cleanup (easy to forget)
client = UntraceClient(api_key="your-api-key")
trace = await client.trace(...)
# Forgot to call client.close()!

2. Handle Errors Gracefully

async def safe_llm_call(prompt: str):
    try:
        trace = await client.trace(event_type="llm_call", data={"prompt": prompt})
        result = await call_llm_api(prompt)
        await client.update_trace(trace.id, {"response": result})
        return result
    except Exception as e:
        if 'trace' in locals():
            await client.update_trace(trace.id, {"error": str(e)})
        raise

3. Use Batch Operations for High Volume

# Good: Batch multiple traces
traces = await client.trace_batch(trace_data_list)

# Avoid: Individual API calls in a loop
for data in trace_data_list:
    await client.trace(data)  # Inefficient

4. Set Appropriate Timeouts

# For long-running operations
client = UntraceClient(
    api_key="your-api-key",
    timeout=120.0  # 2 minutes
)

Troubleshooting

Common Issues

No traces appearing

# Enable debug mode
client = UntraceClient(
    api_key="your-api-key",
    debug=True
)

# Check console for errors

Connection timeouts

# Increase timeout
client = UntraceClient(
    api_key="your-api-key",
    timeout=60.0
)

Memory usage

# Use context managers for automatic cleanup
async with UntraceClient(api_key="your-api-key") as client:
    # Your code here

Async/await issues

# Make sure to use async/await consistently
async def main():
    async with UntraceClient(api_key="your-api-key") as client:
        trace = await client.trace(...)

asyncio.run(main())

API Reference

UntraceClient

The main client class for interacting with the Untrace API.

Constructor

UntraceClient(
    api_key: str,
    base_url: str = "https://untrace.dev/api",
    timeout: float = 30.0,
    max_retries: int = 3,
    retry_delay: float = 1.0,
    debug: bool = False
)

Methods

trace(event_type, data, metadata=None): Send a trace event (async)
trace_sync(event_type, data, metadata=None): Send a trace event (sync)
trace_batch(traces): Send multiple traces in batch (async)
update_trace(trace_id, data): Update an existing trace (async)
get_trace(trace_id): Retrieve a trace by ID (async)
close(): Close the HTTP client

Exception Types

UntraceError: Base exception for all SDK errors
UntraceAPIError: Raised when API requests fail
UntraceValidationError: Raised when request validation fails
UntraceTimeoutError: Raised when requests timeout

Migration Guide

From Other Observability Tools

# Before: Custom logging
import logging
logger = logging.getLogger(__name__)

def call_llm(prompt):
    logger.info(f"Calling LLM with prompt: {prompt}")
    result = openai_call(prompt)
    logger.info(f"LLM response: {result}")
    return result

# After: Untrace SDK
from untrace import UntraceClient

client = UntraceClient(api_key="your-api-key")

async def call_llm(prompt):
    trace = await client.trace(
        event_type="llm_call",
        data={"prompt": prompt}
    )
    result = openai_call(prompt)
    await client.update_trace(trace.id, {"response": result})
    return result

Support

Documentation: https://docs.untrace.dev
GitHub Issues: https://github.com/untrace-dev/untrace/issues
Discord Community: Join our Discord
Email Support: support@untrace.dev

Next Steps

Dashboard Guide

Learn to use the Untrace dashboard

Configuration

Configure your observability setup

Examples

Browse Python example implementations

API Reference

Complete API documentation

​Overview

Quick Start

Framework Support

Async Support

Examples

​Installation

​Quick Start

​Basic Setup

​Synchronous Usage

​Configuration

​Client Options

​Environment Variables

​Framework Integration

​FastAPI

​Django

​Flask

​Celery Integration

​Advanced Usage

​Custom Trace Attributes

​Batch Tracing

​Error Handling

​Context Managers

​Decorators

​Examples

​OpenAI Integration

​LangChain Integration

​Async Generator Support

​Best Practices

​1. Use Context Managers

​2. Handle Errors Gracefully

​3. Use Batch Operations for High Volume

​4. Set Appropriate Timeouts

​Troubleshooting

​Common Issues

​API Reference

​UntraceClient

​Constructor

​Methods

​Exception Types

​Migration Guide

​From Other Observability Tools

​Support

​Next Steps

Dashboard Guide

Configuration

Examples

API Reference

Overview

Installation

Quick Start

Basic Setup

Synchronous Usage

Configuration

Client Options

Environment Variables

Framework Integration

FastAPI

Django

Flask

Celery Integration

Advanced Usage

Custom Trace Attributes

Batch Tracing

Error Handling

Context Managers

Decorators

Examples

OpenAI Integration

LangChain Integration

Async Generator Support

Best Practices

1. Use Context Managers

2. Handle Errors Gracefully

3. Use Batch Operations for High Volume

4. Set Appropriate Timeouts

Troubleshooting

Common Issues

API Reference

UntraceClient

Constructor

Methods

Exception Types

Migration Guide

From Other Observability Tools

Support

Next Steps