azure-functions-logging 0.2.0

Developer-friendly logging helpers for Azure Functions Python

azure-functions-logging

Developer-friendly logging helpers for the Azure Functions Python v2 programming model.

Why Use It

Azure Functions Python handlers share the same logging pain points:

• log output is visually dense and hard to scan
• errors do not stand out from info-level noise
• default formatting is not optimized for human readability

azure-functions-logging provides colorized, cleanly formatted log output that works with Python's standard logging module and requires minimal setup.

Scope

• Azure Functions Python v2 programming model
• Python's standard logging module
• Colorized and JSON log output
• Invocation context injection and cold start detection

This package does not target distributed tracing, log aggregation, or OpenTelemetry integration.

Features

• Colorized log levels (DEBUG gray, INFO blue, WARNING yellow, ERROR red, CRITICAL bold red)
• JSON structured log output for production and CI environments
• Clean [TIME] [LEVEL] [LOGGER] message format
• setup_logging() one-liner configuration
• get_logger(__name__) helper for convenient logger creation
• Automatic invocation context injection (invocation_id, function_name, trace_id)
• Cold start detection without manual instrumentation
• Context binding via logger.bind(user_id="abc")
• host.json log level conflict warning
• Exception-friendly output with readable stack traces
• Compatible with Python's standard logging module

Installation

pip install azure-functions-logging

Quick Start

from azure_functions_logging import get_logger, setup_logging

setup_logging()

logger = get_logger(__name__)
logger.info("Processing request")

JSON Output

setup_logging(format="json")

logger = get_logger(__name__)
logger.info("Processing request")
# {"timestamp": "...", "level": "INFO", "logger": "...", "message": "Processing request", ...}

Context Injection

from azure_functions_logging import inject_context

def my_function(req, context):
    inject_context(context)
    logger.info("Handling request")  # includes invocation_id, function_name, trace_id

Context Binding

bound = logger.bind(user_id="abc", operation="checkout")
bound.info("Processing")  # includes user_id + operation in every log line

Development

git clone https://github.com/yeongseon/azure-functions-logging.git
cd azure-functions-logging
pip install -e .[dev]

Documentation

• Product requirements: PRD.md

Disclaimer

This project is an independent community project and is not affiliated with, endorsed by, or maintained by Microsoft.

Azure and Azure Functions are trademarks of Microsoft Corporation.

License

MIT