[Question] How to use Loguru defaults + and extra information?

Hi, I’m still researching about Loguru, but I can’t find an easy way to do this. I want to use the default options from Loguru, I believe they are great, but I want to add information to it, I want to add the IP of a request that will be logged.

If I tried this:

import sys
from loguru import logger
logger.info("This is log info!")
# This is directle from Loguru page
logger.add(sys.stderr, format="{extra[ip]} {extra[user]} {message}")
context_logger = logger.bind(ip="192.168.0.1", user="someone")
context_logger.info("Contextualize your logger easily")
context_logger.bind(user="someone_else").info("Inline binding of extra attribute")
context_logger.info("Use kwargs to add context during formatting: {user}", user="anybody")

That logs this:

I know that with logger.remove(0) I will remove the default logs, but I want to use it to obtain something like this: 2022-02-03 15:16:54.920 | INFO | __main__:<module>:79 - XXX.XXX.XX.X - Use kwargs to add context during formatting: anybody, with XXX.XXX.XX.X being the IP. Using the default config (for color and the rest of thing) and adding a little thing to the format.

I’m trying to access the default configs, but I haven’t been able to import them and use them with logger.add. I think I will have to configure everything from scratch.

Hope someone can help me, thanks.

[Delgan]

Hi @antusystem.

I think you simply need to add() your handler using a custom format containing the extra information. Here is an example:

logger_format = (
    "<green>{time:YYYY-MM-DD HH:mm:ss.SSS}</green> | "
    "<level>{level: <8}</level> | "
    "<cyan>{name}</cyan>:<cyan>{function}</cyan>:<cyan>{line}</cyan> | "
    "{extra[ip]} {extra[user]} - <level>{message}</level>"
)
logger.configure(extra={"ip": "", "user": ""})  # Default values
logger.remove()
logger.add(sys.stderr, format=logger_format)

[Delgan]

Indeed, you need to specify level="TRACE" if you want all logs of "TRACE" level or above to be propagated to the handler (the default is "DEBUG").

You can use bind() where you need to set an user locally and configure() to set the default value globally. 👍