Python FME Logger

Introduction

The Python FME Logger is a powerful logging library for Python applications. It provides a flexible way to log messages, errors, and other information during the execution of an application. It is specifically designed for use with the FME (Feature Manipulation Engine) software, but can be used in any Python project.

Features

Logging Levels

The logger supports different logging levels, allowing developers to control the verbosity of the logs. The supported logging levels are:

• DEBUG: For debugging purposes, providing detailed information about the application's execution.
• INFO: For general information about the application's progress.
• WARNING: For warning messages that suggest potential issues in the application's execution.
• ERROR: For error messages indicating a failure or problem in the application's execution.
• CRITICAL: For critical errors that require immediate attention.

Logging Handlers

The logger supports multiple logging handlers, which determine where the log messages are sent. The supported logging handlers are:

• ConsoleHandler: Sends log messages to the console.
• FileHandler: Writes log messages to a specified file.
• RotatingFileHandler: Writes log messages to a file, rotating the file after reaching a certain size or at specific time intervals.

Logging Format

The logger allows developers to customize the format of the log messages. It supports various placeholders that can be used to include relevant information, such as the log level, timestamp, module name, and the log message itself.

Logging Configuration

The logger can be configured using a configuration file or programmatically. This allows developers to easily customize the logger's behavior without modifying the application's code. The configuration file can specify the logging levels, handlers, log format, and other settings.

Integration with FME

The Python FME Logger integrates seamlessly with the FME software. It provides a convenient way to log messages within FME Transformers, allowing developers to capture and analyze data processing events. The logs can be used for troubleshooting, performance analysis, and auditing purposes.

Example Usage

To use the Python FME Logger in your application, follow these steps:

1. Install the logger library by running the following command:

pip install fme-logger

2. Import the logger in your Python code:

import fme_logger

3. Configure the logger:

fme_logger.configure_logging(logger_name='my_logger', log_level='DEBUG', log_handlers=['ConsoleHandler', 'FileHandler'])

4. Start logging messages:

logger = fme_logger.get_logger('my_logger')
logger.debug('This is a debug message')
logger.info('This is an info message')
logger.warning('This is a warning message')
logger.error('This is an error message')
logger.critical('This is a critical message')

Conclusion

The Python FME Logger is a versatile logging library that provides powerful logging capabilities for Python applications, especially those using the FME software. It offers flexible logging levels, various logging handlers, customizable log formats, and easy integration with FME. By effectively using the logger, programmers can improve their application's debugging, monitoring, and analysis capabilities.