Grey Logger: An Ultimate Guide

Grey Logger is a powerful and flexible logging library designed to make application logging simple and efficient. This guide will introduce you to Grey Logger and provide comprehensive code snippets for dozens of its useful APIs. Additionally, we will showcase an app example using the introduced APIs.

Getting Started

To install Grey Logger, use pip:

  pip install grey-logger

Basic Usage

Here’s a basic example to get started with Grey Logger:

  import grey_logger

  logger = grey_logger.get_logger('my_logger')

  logger.info('This is an info message')
  logger.error('This is an error message')

Configuring Logger

You can configure the logger with different settings:

  config = {
      'level': 'DEBUG',
      'format': '%(asctime)s - %(name)s - %(levelname)s - %(message)s',
      'handlers': [
          {
              'type': 'console',
              'color': True
          },
          {
              'type': 'file',
              'filename': 'app.log',
              'mode': 'w'
          }
      ]
  }
  grey_logger.configure(config)

  logger = grey_logger.get_logger('my_logger')

Advanced Usage

Grey Logger provides advanced capabilities such as custom filters and context managers:

  class CustomFilter(grey_logger.BaseFilter):
      def filter(self, record):
          return 'important' in record.msg

  logger.add_filter(CustomFilter())

  with logger.contextualize(user='Alice', action='login'):
      logger.info('User logged in')

API References

get_logger(name)

Creates or retrieves a logger with the provided name:

  logger = grey_logger.get_logger('app_logger')

configure(settings)

Configures global logging settings:

  grey_logger.configure(settings)

debug(message)

Logs a debug message:

  logger.debug('This is a debug message')

info(message)

Logs an info message:

  logger.info('This is an info message')

warning(message)

Logs a warning message:

  logger.warning('This is a warning message')

error(message)

Logs an error message:

  logger.error('This is an error message')

critical(message)

Logs a critical message:

  logger.critical('This is a critical message')

exception(message)

Logs an exception traceback with a message:

  try:
      1 / 0
  except ZeroDivisionError:
      logger.exception('Division by zero')

App Example

Here is a small app example utilizing Grey Logger:

  import grey_logger

  config = {
      'level': 'INFO',
      'format': '%(asctime)s - %(name)s - %(levelname)s - %(message)s',
      'handlers': [
          {
              'type': 'console',
              'color': True
          }
      ]
  }
  grey_logger.configure(config)
  logger = grey_logger.get_logger('app')

  def app():
      logger.info('Application started')
      try:
          # Application logic here
          raise ValueError('An expected error occurred!')
      except Exception as e:
          logger.exception('An error occurred: %s', e)
      logger.info('Application finished')

  if __name__ == '__main__':
      app()

With the detailed examples and comprehensive API references, you can now leverage the capabilities of Grey Logger to improve your application’s logging system efficiently. For more information, refer to the official documentation and start enhancing your logging mechanism today!

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