change the keys' names in a python json logger

Question

I want to change the keys' names in my python json logger:

import logging
from pythonjsonlogger import jsonlogger

def main() -> None:

    logger = logging.getLogger("myLovelyLogger")
    logger.warning("something terrible happened")

if __name__ == "__main__":

    logger = logging.getLogger("myLovelyLogger")
    handler = logging.StreamHandler()
    handler.setLevel(logging.INFO)

    formatter = jsonlogger.JsonFormatter(
        fmt="%(asctime)s %(name)s %(levelname)s %(message)s",
        datefmt="%d/%m/%y[ %H:%M:%S ]",
        json_indent=4
    )

    handler.setFormatter(formatter)
    logger.addHandler(handler)

    main()

When I run it, everything goes well, I just want to change some keys' names:

$ python3 main.py
{
    "asctime": "29/06/22[ 13:44:55 ]", # <--- change "asctime" to "time"
    "name": "myLovelyLogger",
    "levelname": "WARNING",            # <--- change "levelname" to "level"
    "message": "something terrible happened"
}

How can I achieve that?

Does this answer your question? python logging - With JSON logs can I add an "extra" value to every single log?. There is also example in the docs. — buran
– buran, Commented Jun 29, 2022 at 10:51
@buran the post you mentioned was indeed similar, but still different enough. thanks. — OrenIshShalom
– OrenIshShalom, Commented Jun 29, 2022 at 11:11
Thanks for sharing the solution. I'll retract my closing vote — buran
– buran, Commented Jun 29, 2022 at 11:15

OrenIshShalom · Accepted Answer · 2022-06-29 11:10:51Z

5

Apparently I missed this option in the documentation.

    formatter = jsonlogger.JsonFormatter(
        fmt="%(asctime)s %(name)s %(levelname)s %(message)s",
        rename_fields={"asctime": "time", "levelname": "level"}, # <--- added this line
        datefmt="%d/%m/%y[ %H:%M:%S ]",
        json_indent=4
    )

Then I get the desired result 🙂:

$ python3 main.py
{
    "time": "29/06/22[ 14:10:12 ]",
    "name": "myLovelyLogger",
    "level": "WARNING",
    "message": "something terrible happened"
}

answered Jun 29, 2022 at 11:10

OrenIshShalom

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1 Comment

Sabil Over a year ago

Ahh, you were fast. I am just trying to add my solution. :D

Yannic Hamann · Accepted Answer · 2024-01-25 14:19:48Z

0

Renaming exc_info only works with version 2.0.6 or later. See here.

answered Jan 25, 2024 at 14:19

Yannic Hamann

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