datefmt=%s example for python logging

conf.ini

[loggers]
keys = root

[handlers]
keys = console

[formatters]
keys = generic

[logger_root]
level = INFO
handlers = console

[handler_console]
class = StreamHandler
args = (sys.stderr,)
level = NOTSET
formatter = generic

[formatter_generic]
format = %(asctime)s %(levelname)-5.5s [%(name)s] %(message)s
datefmt = %s

output.txt

$ python test.py
1329165116 CRITI [root] hello, world!

test.py

import logging.config

logging.config.fileConfig("conf.ini")
logging.fatal("hello, world!")