@Marvin im using loguru with opentelementry handler in my flows, how i can add additional handler from prefect to include messages to loguru

It seems I ran into a little snag while searching for relevant information. Let's tackle this step by step. To add an additional handler to Loguru from Prefect, you generally want to integrate Prefect's logging with Loguru. Prefect 2.x and 3.x offer logging mechanisms that can be interfaced with Loguru. Here's how you can approach adding an additional handler: 1. Integrate Prefect Logs with Loguru: - Prefect allows you to configure logging settings via environment variables or directly within the flow by adjusting the

logging

settings. - You'd typically add a custom handler to route Prefect logs to Loguru. 2. Sample Code Integration: Given your setup with OpenTelemetry, you might already be handling logs in a certain way. To integrate Prefect logs with Loguru, make sure to configure Prefect's logger to utilize Loguru's logging functions. Here’s a rough generic approach without version-specific syntax (as my search didn't find specific version-related details):

python
   from loguru import logger
   import prefect

   # Configure Loguru to intercept Prefect logs
   class InterceptHandler:
       def log(self, record):
           level = logger.level(record.levelname).name
           frame, depth = logging.currentframe(), 2
           logger.opt(depth=depth, exception=record.exc_info).log(level, record.getMessage())

   # Initialize Prefect logging to use Loguru
   handler = InterceptHandler()
   prefect.utilities.logging.configure_logging({'handlers': handler})

   # Now flow logs should filter through Loguru

Bear in mind, you might need to adjust specific configurations depending on your Loguru and OpenTelemetry setup. For more specific and precise guidance, I'd recommend exploring Prefect's documentation for up-to-date information on log handling in the version you're using, or making sure I have the correct search parameters and access rights for more precise queries in Prefect's GitHub issues. If you encounter any peculiar behavior or errors when trying this setup, feel free to reach out with those specifics!

@Marvin im using prefect 3 and loguru has 2 handlers: stdout and custom opentelemetry handler 1. i want to catch messages from prefect logger, and add it to loguru 2. i want see loguru messages in prefect UI

To achieve the integration of Loguru with Prefect 3 so that you can catch messages from the Prefect logger and see Loguru messages in the Prefect UI, you'll want to follow a few steps. 1. Redirect Prefect Loggers to Loguru: Prefect 3 allows you to configure logging for better monitoring and auditing of your flows and tasks. You can intercept Prefect logs and pass them to Loguru as follows: - Utilize Loguru's handler to capture logs from Prefect. You can create a custom handler to send logs from Prefect’s logger to Loguru. Here's a rough example of how you could do this:

python
   from loguru import logger
   import prefect

   class InterceptHandler:
       def emit(self, record):
           # Get corresponding Loguru level if it exists
           try:
               level = logger.level(record.levelname).name
           except AttributeError:
               level = str(record.levelno)

           # Find caller from where originated the log
           frame, depth = logging.currentframe(), 2
           while frame.f_code.co_filename == logging.__file__:
               frame = frame.f_back
               depth += 1
           logger.opt(depth=depth, exception=record.exc_info).log(level, record.getMessage())

   # Setting up the custom handler to intercept Prefect logger
   intercept_handler = InterceptHandler()
   prefect_logger = prefect.utilities.logging.get_logger()
   prefect_logger.handlers = [intercept_handler]

   # Now all log messages from Prefect are redirected to Loguru

2. Display Loguru Messages in Prefect UI: - Make sure that the Loguru logs are configured to propagate to the Prefect UI. Prefect UI can display logs that are emitted by its logger framework. You will need to ensure that log messages from Loguru are directed into the Prefect log handlers. You may need to set log propagation flags in Loguru properly so that logs do not just terminate in the console but flow back to Prefect’s log capturing system. 3. Additional Configuration: According to logs in Prefect documentation, you can configure the logging settings either via environment variables or through configuration files (YAML or others) to match specific needs, such as log color and styles in the terminal, which does not impact the UI. Check out the Prefect 3 Logging Documentation for more in-depth settings. Given the complexity of log system interception and propagation, you may need to further refine these handlers based on your specific environment and needs. If you get stuck on particular issues, Prefect’s community forums or Slack might provide additional hints tailored to your exact setup. If all else fails, maybe a Vogon poetry recital would speed things up—but that's just Marvin's style.