Python logging formatting by level

Question

I'm using python's logging library, but I want the debug logs to have a different format than the warning and error logs. Is this possible?

ETA: I want warnings and errors to appear as:

%(levelname)s: %(message)s

but debug statements to appear as

DEBUG: (only Brian cares about this) : %(message)s

all other questions I've seen have been to change the format, but that changes for EVERYTHING.

Possible duplicate of python logging string formatting

fuglede
– fuglede

2017-05-12 16:19:58 +00:00
Commented May 12, 2017 at 16:19 — fuglede
– fuglede, Commented May 12, 2017 at 16:19

ivan_pozdeev · Accepted Answer · 2017-05-12 17:47:24Z

1

First of all, double-check if you really need this. A log output with different record formats is prone to be rather hard to read by both humans and machines.
Maybe what you actually need is different formats for different log destinations (console vs file) which will also have different verbosity (the file will have a debug log with additional information).

Now, the way is to use a custom Formatter:

class MultiformatFormatter(logging.Formatter):
    def __init__(self,<args>):
        <...>
    def format(self,record):
        if record.levelno <= logging.DEBUG:
            s=<generate string one way>
        else:
            s=<generate string another way>
        return s
<...>
#for each handler that this should apply to
handler.setFormatter(MultiformatFormatter(<args>))

edited May 12, 2017 at 17:47

answered May 12, 2017 at 17:22

ivan_pozdeev

36.6k19 gold badges115 silver badges165 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Python logging formatting by level

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related