How can I implement custom logging levels in Python?

How can I implement custom logging levels in Python?

You can create custom logging levels in Python by using the logging module. First, define a new level using the addLevelName method.

Can you show me a code example for that?

Sure! Here's a simple example:

import logging

# Define a custom logging level
CUSTOM_LEVEL = 25
logging.addLevelName(CUSTOM_LEVEL, 'CUSTOM')

# Create a custom logger
logger = logging.getLogger(__name__)
logger.setLevel(CUSTOM_LEVEL)

# Create a handler and set level to custom
handler = logging.StreamHandler()
handler.setLevel(CUSTOM_LEVEL)

# Create a formatter and add it to the handler
formatter = logging.Formatter('%(levelname)s: %(message)s')
handler.setFormatter(formatter)

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

# Log a message with the custom level
logger.log(CUSTOM_LEVEL, 'This is a custom log message!')

What if I want to log messages at different levels?

You can define multiple custom levels by repeating the process for each level you want to create. Just ensure each level has a unique integer value.