multiple logger

[peiyin.li@gmail.com]

Hi,

I want to have two loggers that logs to two different files. Here is
what I have:

import logging
import logging.handler s

project1Handler = logging.handler s.RotatingFileH andler( 'project1.log',
maxBytes=1024)
project1Handler .setLevel(loggi ng.INFO)
formatter1 = logging.Formatt er('%(name)-12s: %(levelname)-8s
%(message)s')
project1Handler .setFormatter(f ormatter1)
logging.getLogg er('project1'). addHandler(proj ect1Handler)
logger1 = logging.getLogg er('project1')

logger1.debug(' Quick zephyrs blow, vexing daft Jim.')
logger1.info('H ow quickly daft jumping zebras vex.')
logger1.warning ('Jail zesty vixen who grabbed pay from quack.')
logger1.error(' The five boxing wizards jump quickly.')


project2Handler = logging.handler s.RotatingFileH andler( 'project2.log',
maxBytes=1024)
project2Handler .setLevel(loggi ng.DEBUG)
formatter2 = logging.Formatt er('%(name)-12s: %(levelname)-8s
%(message)s')
project2Handler .setFormatter(f ormatter2)
logging.getLogg er('project2'). addHandler(proj ect2Handler)
logger2 = logging.getLogg er('project2')

logger2.debug(' Quick zephyrs blow, vexing daft Jim.')
logger2.info('H ow quickly daft jumping zebras vex.')
logger2.warning ('Jail zesty vixen who grabbed pay from quack.')
logger2.error(' The five boxing wizards jump quickly.')


However, I got this for project1.log:

project1 : WARNING Jail zesty vixen who grabbed pay from quack.
project1 : ERROR The five boxing wizards jump quickly.

and this for project2.log:

project2 : WARNING Jail zesty vixen who grabbed pay from quack.
project2 : ERROR The five boxing wizards jump quickly.

Where are the DEBUG and INFO messages go?

I then add this at the begining of my code:

logging.basicCo nfig(level=logg ing.DEBUG)

Now it seems that both project1.log and project2.log has the correct
output. But I also see all the log message going to the console, which
I really don't want.

What did I miss here? Do I have to set a handler for the root logger
before I can set something for the child loggers? If yes, how do I make
the root logger logs to nowhere?

Thanks in advance!

Albert

[Vinay Sajip]

Re: multiple logger

Just replace

logging.basicCo nfig(level=logg ing.DEBUG)

with

logging.getLogg er().setLevel(l ogging.DEBUG)

and you will no longer get messages written to the console. The
basicConfig() method is meant for really basic use of logging - it
allows one call to set level, and to add either a console handler a
simple (non-rotating) file handler to the root logger. See the
documentation for more information.

Vinay Sajip