Creating multiple loggers in Python to different outputs in the same module

Question

So I want to create multiple loggers in the same module

log = logging.getLogger('FirstLogger')
plog = logging.getLogger('SecondLogger')

and I want to configure each logger separately.

so I added a FileHandler for plog that only takes logging.INFO or above while the FileHandler for log would take logging.DEBUG or above.

I have created an init_logger() function that takes in the instance of the logger to perform the configuration on

def init_logger(logger, fmode, cmode)

So i want FirstLogger to log to a file that i created separately for it and log with DEBUG level. I would do

log = logging.getLogger('FirstLogger')
init_logger(log,logging.DEBUG,logging.INFO)

plog = logging.getLogger('SecondLogger')
init_logger(plog,logging.INFO,logging.INFO)

In init_logger I specify different files for the FileHandler and set the levels according to what is passed to init_logger.

flog = logging.FileHandler(logfile)
flog.setLevel(fmode)
flog.setFormatter(...)

console = logging.StreamHandler()
console.setLevel(cmode)
console.setFormatter(...)

log.addhandler(flog)
log.addHandler(console)

The problem I have is that even though 'log' has console set level to INFO and the FileHandler to DEBUG I still only get INFO in both the file and the console. I can't figure out what is wrong with what I am doing.

Pedru · Accepted Answer · 2016-04-26 14:50:18Z

1

You set the level of the file handler to DEBUG, but you do not set the level of the logger itself to DEBUG

log.setLevel(min(cmode, fmode))

answered Apr 26, 2016 at 14:50

Pedru

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2 Comments

pengwinsurf Over a year ago

Thanks @Pedru. I indeed forgot to set the level of the logger itself.

Pedru Over a year ago

glad I could help =)

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