Welcome to the Ultimate Guide to LibraryLogger!

LibraryLogger is a powerful and versatile logging library designed to meet all your logging needs. In this comprehensive guide, we will explore dozens of useful API explanations along with code snippets to help you integrate LibraryLogger into your applications effortlessly.

Getting Started

To begin using LibraryLogger, first, install it via pip:

  pip install librarylogger

Basic Usage

The following example demonstrates basic usage of LibraryLogger:

  
    from librarylogger import Logger

    logger = Logger('my_app')
    logger.info('This is an info message')
    logger.error('This is an error message')
    logger.debug('This is a debug message')
  

Advanced Features

LibraryLogger offers advanced features including custom handlers, formatters, and filters. Here are some examples:

Custom Handlers

  
    from librarylogger import Logger, FileHandler

    logger = Logger('my_app')
    file_handler = FileHandler('app.log')
    logger.add_handler(file_handler)
    logger.info('This will be logged to app.log')
  

Custom Formatters

  
    from librarylogger import Logger, Formatter

    logger = Logger('my_app')
    formatter = Formatter('%(asctime)s - %(levelname)s - %(message)s')
    logger.set_formatter(formatter)
    logger.info('This message will be formatted accordingly')
  

Custom Filters

  
    from librarylogger import Logger, Filter

    logger = Logger('my_app')
    
    class CustomFilter(Filter):
        def filter(self, record):
            return 'important' in record.msg

    filter = CustomFilter()
    logger.add_filter(filter)
    logger.info('This is an important message')
    logger.info('This message will not be logged')
  

App Example with LibraryLogger

Let’s demonstrate building a small application that incorporates some of the introduced APIs:

  
    from librarylogger import Logger, FileHandler, Formatter

    class MyApp:
        def __init__(self):
            self.logger = Logger('my_app')
            self.configure_logger()

        def configure_logger(self):
            # Set up file handler
            file_handler = FileHandler('my_app.log')
            self.logger.add_handler(file_handler)
            
            # Set up formatter
            formatter = Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
            self.logger.set_formatter(formatter)

        def run(self):
            self.logger.info('Application started')
            try:
                # Simulating code execution
                result = self.do_something()
                self.logger.info(f'Application finished successfully with result: {result}')
            except Exception as e:
                self.logger.error(f'Application error occurred: {str(e)}')

        def do_something(self):
            self.logger.debug('Performing some task')
            # Execute some logic here
            return 'Task result'

    if __name__ == '__main__':
        app = MyApp()
        app.run()
  

With this structured logging setup, your application logs will be well-organized and easy to analyze.

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