How can I implement custom logging in Python?

How can I implement custom logging in Python?

You can create a custom logger by using the logging module. First, import it and then configure your logger.

What are the steps to configure a logger?

1. Import the logging module. 2. Create a logger object. 3. Set the logging level. 4. Create handlers and formatters. 5. Add handlers to the logger.

Can you show me a code example?

Sure! Here's a simple example:

import logging

# Create a logger
logger = logging.getLogger('my_logger')
logger.setLevel(logging.DEBUG)

# Create a console handler
ch = logging.StreamHandler()
ch.setLevel(logging.DEBUG)

# Create a formatter
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
ch.setFormatter(formatter)

# Add the handler to the logger
logger.addHandler(ch)

# Log a message
logger.debug('This is a debug message')

What if I want to log to a file instead?

You can use FileHandler instead of StreamHandler. Just replace the handler creation line with:

fh = logging.FileHandler('my_log.log')
fh.setLevel(logging.DEBUG)