What are the best practices for logging in Python 3.9?

What are the best practices for logging in Python 3.9?

In Python 3.9, best practices for logging include using the built-in logging module, setting appropriate log levels, and configuring log formatting for clarity.

How do I set up a basic logger?

You can set up a basic logger by importing the logging module and using logging.basicConfig() to configure it. For example:

import logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)
logger.info('This is an info message')

What log levels should I use?

Common log levels include DEBUG, INFO, WARNING, ERROR, and CRITICAL. Use DEBUG for detailed information, INFO for general messages, WARNING for potential issues, ERROR for errors that occur, and CRITICAL for serious errors.

Can I log to a file instead of the console?

Yes, you can log to a file by specifying the filename parameter in basicConfig(). For example:

logging.basicConfig(filename='app.log', level=logging.INFO)