How can I create custom log levels in Python's logging module?

How can I create custom log levels in Python's logging module?

You can create custom log levels in Python by defining a new level and adding it to the logging module. Would you like a code example?

Yes, please provide a code example.

Here's a simple example:

import logging

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

# Create a custom logging method
def custom_log(self, message, *args, **kwargs):
    if self.isEnabledFor(CUSTOM_LEVEL):
        self._log(CUSTOM_LEVEL, message, args, **kwargs)

logging.Logger.custom = custom_log

# Usage
logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)
logger.custom('This is a custom log message!')

What does the custom log level do in this example?

In this example, the custom log level allows you to log messages at a level of 25, which is between DEBUG (10) and INFO (20). This can help you categorize logs more specifically.