How can I format logs in Python 3 using the logging module?

How can I format logs in Python 3 using the logging module?

You can format logs in Python 3 by using the logging module's Formatter class. You can specify the format you want using a format string.

Can you show me an example of how to set a custom log format?

Sure! Here's a simple example:

import logging

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

# Create handlers
handler = logging.StreamHandler()

# Create a formatter and set it for the handler
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
handler.setFormatter(formatter)

# Add the handler to the logger
logger.addHandler(handler)
logger.setLevel(logging.INFO)

# Log a message
logger.info('This is an info message')

What do the format specifiers like %(asctime)s mean?

The %(asctime)s specifier includes the timestamp of when the log entry was created. Other specifiers include %(name)s for the logger's name, %(levelname)s for the log level, and %(message)s for the actual log message.