Python File Logging: A Step-by-Step FileHandler Tutorial

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Python’s logging module provides a flexible framework for generating log messages and FileHandler is a key component for writing logs to files. Let’s explore how to implement file logging effectively.

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Basic File Logging Setup

import logging

# Basic configuration
logging.basicConfig(
    filename='app.log',
    level=logging.INFO,
    format='%(asctime)s - %(levelname)s - %(message)s'
)

# Example log messages
logging.debug('This is a debug message')
logging.info('This is an info message')
logging.warning('This is a warning message')
logging.error('This is an error message')
logging.critical('This is a critical message')

This code snippet logs the above messages to the app.log file. This is how the file looks like:

Using FileHandler

Basic FileHandler Setup

import logging

# Create logger
logger = logging.getLogger('my_app')…