I have just been writing some code in which I define a custom log level with
the logging module. I wanted to call the new log level as an attribute but
currently the logging library lacks a nice way to do this. I know that in the
docs https://docs.python.org/3/howto/logging.html#custom-levels it discourages
creating custom log levels so perhaps this was why there is no way to do this.
This
https://stackoverflow.com/questions/2183233/how-to-add-a-custom-loglevel-to-pythons-logging-facility/13638084#13638084
StackOverflow solution allows for the syntax I was after, but it is hard to
understand for someone looking at the code.
import logging
CUSTOM_LEVEL = 31
CUSTOM_LEVEL_NAME = 'CUSTOM_WARNING'
def custom_warning(self, message, *args, **kwargs):
if logger.isEnabledFor(CUSTOM_LEVEL):
logger._log(CUSTOM_LEVEL, message, args, **kwargs)
logging.Logger.custom_warning = custom_warning
logger = logging.getLogger(__name__)
logger.warning('a warning here!')
logger.custom_warning('a custom warning!')
I would propose something like
logger.addCustomLevel(CUSTOM_LEVEL, CUSTOM_LEVEL_NAME)
There are some obvious limitations to this approach, all level names would also
have to be valid function names otherwise something like
logger.addCustomLevel(CUSTOM_LEVEL, "1 2 3")
would be an issue
what does everybody think?
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