🔹 What is stdlib?

stdlib stands for Standard Library in Python.

• Python comes with a batteries-included standard library — a set of modules and packages available without installing anything extra.

• Examples include os, sys, logging, json, math, datetime, etc.

🔹 structlog.stdlib

In structlog, you’ll often see references like:

import structlog

structlog.stdlib.add_log_level
structlog.stdlib.add_logger_name
structlog.stdlib.LoggerFactory

These are helpers that integrate structlog with Python’s built-in logging module (which is part of the standard library).

What it does:

• Makes structlog logs compatible with the standard Python logging system.

• Allows you to use existing log handlers (console, file, etc.) from the standard library.

• Adds metadata like logger name, log level, timestamps automatically.

🔹 Example

import logging
import structlog

logging.basicConfig(level=logging.INFO, format="%(message)s")

structlog.configure(
    processors=[
        structlog.stdlib.add_logger_name,  # adds logger name
        structlog.stdlib.add_log_level,    # adds log level
        structlog.processors.TimeStamper(fmt="iso"),  # adds timestamp
        structlog.stdlib.ProcessorFormatter.wrap_for_formatter,
    ],
    logger_factory=structlog.stdlib.LoggerFactory(),  # uses stdlib logging
)

log = structlog.get_logger("my_std_logger")
log.info("user_logged_in", user="Abhishek")

Output:

timestamp='2025-08-18T10:50:00Z' level='info' logger='my_std_logger' event='user_logged_in' user='Abhishek'

✅ Here, stdlib functions are bridging structlog with Python’s standard logging.