Introduction to Douane Logger

Douane-logger is a powerful logging library that simplifies the process of logging for applications. Designed to be lightweight and easy to integrate, it provides a wide variety of features that developers can use to enhance their applications. In this guide, we will delve into dozens of useful APIs provided by douane-logger and show you how to implement them with code snippets.

Getting Started

To start using douane-logger, you need to install it using your package manager. After installation, you can import and configure it as shown below:

  
    # Install using pip
    pip install douane-logger

    # Example of importing and configuring
    from douane_logger import Logger

    logger = Logger(name='my_logger', level='INFO')
  

API Example 1: Basic Logging

This example demonstrates basic logging including informational and error messages.

  
    # Log a simple info message
    logger.info('This is an informational message')
    # Log an error message
    logger.error('This is an error message')
  

API Example 2: Logging Levels

Douane-logger supports various logging levels like DEBUG, INFO, WARNING, ERROR, and CRITICAL. Here’s how you can use them:

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

API Example 3: Advanced Configuration

Advanced configurations like setting custom handlers and formatters can be easily done:

  
    from douane_logger import Logger, Handler, Formatter

    handler = Handler('my_handler')
    formatter = Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
    handler.setFormatter(formatter)

    logger.addHandler(handler)
  

API Example 4: File Logging

Support for logging to files is also available. This can help in persisting logs beyond the application’s lifecycle:

  
    file_handler = Handler('file_handler', filename='app.log', mode='w')
    logger.addHandler(file_handler)

    logger.info('This message will be written to app.log')
  

App Example

Below is an example of an application that utilizes various features of douane-logger:

  
    from douane_logger import Logger, Handler, Formatter

    # Configure logger
    logger = Logger(name='app_logger', level='DEBUG')
    file_handler = Handler('file_handler', filename='app.log', mode='w')
    formatter = Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
    file_handler.setFormatter(formatter)
    logger.addHandler(file_handler)

    # Sample application code
    def main():
        logger.info('Application started')
        try:
            # Simulate some operations
            result = 10 / 0
        except ZeroDivisionError:
            logger.error('Division by zero error occurred')

        logger.info('Application finished')

    if __name__ == '__main__':
        main()
  

These examples should provide a comprehensive understanding of how to implement douane-logger in your applications. Douane-logger’s simple yet powerful API makes it an excellent choice for both small and large scale projects.

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