How to change the default logging configuration

Hello,

To change the default logging configuration in Python and remove the UUID preceding the messages, you can use the logging module to customize the log format.

import logging

def configure_logging():
    logger = logging.getLogger()
    logger.setLevel(logging.INFO)
    
    if logger.hasHandlers():
        logger.handlers.clear()

    log_format = "%(levelname)-9s %(asctime)s %(message)s"
    formatter = logging.Formatter(log_format)

    stream_handler = logging.StreamHandler()
    stream_handler.setLevel(logging.INFO)
    stream_handler.setFormatter(formatter)

    logger.addHandler(stream_handler)

configure_logging()

def lambda_handler(event, context):
    logger = logging.getLogger()
    logger.info("This is an info log message.")
    logger.warning("This is a warning log message.")
    logger.error("This is an error log message.")

Hello,

Based on the image you sent, it appears you're encountering issues with formatting and UUIDs while using Python logging.

Custom Formatting:

• Python logging offers extensive customization options for log messages' appearance. You can define a custom formatter that excludes UUIDs and aligns messages as needed using logging.Formatter.

import logging

logger = logging.getLogger(__name__)
logger.setLevel(logging.INFO)

# Remove any existing handlers (just in case)
for handler in logger.handlers[:]:
    logger.removeHandler(handler)

# Define a custom formatter (excluding UUIDs)
format_string = "%(levelname)-9s  %(asctime)s %(message)s"
formatter = logging.Formatter(format_string)

# Create a Stream Handler for console output
stream_handler = logging.StreamHandler()
stream_handler.setLevel(logging.INFO)
stream_handler.setFormatter(formatter)

# Add the Stream Handler to the logger
logger.addHandler(stream_handler)

# Now you can log messages without UUIDs
logger.info("This is an info log message.")

Filter Out UUIDs:

• If you specifically want to remove UUIDs, you can implement a custom filter class that checks for UUID patterns and excludes those messages from being logged.

import logging

class NoUUIDFilter(logging.Filter):
    def filter(self, record):
        return not str(record.message).startswith("UUID:")

handler = logging.StreamHandler()
handler.addFilter(NoUUIDFilter())

# ... rest of your logging setup

Third-Party Libraries:

Explore third-party libraries like structlog or loguru that provide advanced logging functionalities and often simplify message formatting and handling.

Somehow, I've tried all the examples you've given to me. I'll give them a try again and check if something is missing.

Regards all of you

Jona