log

log.py

In [1]: %paste
import sys
import logging

PROGRESS = 1000

class MyLogger(logging.Logger):

    PROGRESS = PROGRESS
    LOG_FORMATTER = '%(asctime)s - %(levelname)-10s - %(funcName)s - %(message)s'
    DEF_LOGGING_LEVEL = logging.WARNING

    def __init__(self, log_name, level=None):
        logging.Logger.__init__(self, log_name)
        self.formatter = logging.Formatter(self.LOG_FORMATTER)
        self.initLogger(level)

    def initLogger(self, level=None):
        self.setLevel(level or self.DEF_LOGGING_LEVEL)
        self.propagate = False

    def add_handler(self, log_file, use_syslog):
        if use_syslog : hdlr = logging.handlers.SysLogHandler(address='/dev/log')
        elif log_file : hdlr = logging.FileHandler(log_file)
        else          : hdlr = logging.StreamHandler(sys.stderr)
        hdlr.setFormatter(self.formatter)
        self.addHandler(hdlr)
        return hdlr

    def addHandlers(self, log_file=None, progress_file=None, use_syslog=False):
        self.logger_hdlr = self.add_handler(log_file, use_syslog)
        if progress_file:
            self.progress_hdlr = self.add_handler(progress_file, use_syslog)
            self.progress_hdlr.setLevel(self.PROGRESS)
        else:
            self.progress_hdlr = None

    def progress(self, txt, *args, **kwargs):
        if self.isEnabledFor(self.PROGRESS):
            txt = txt % (args)
            for line in txt.split('\n'):
                self._log(self.PROGRESS, line, [], **kwargs)


logging.setLoggerClass(MyLogger)
logging.addLevelName(PROGRESS, 'PROGRESS')
logger = logging.getLogger(__name__)
logger.addHandlers()

def a():
    name = 'John'
    logger.progress('Hello %s\nHow are you doing?', name)

a()

## -- End pasted text --
2013-10-27 17:32:44,333 - PROGRESS   - a - Hello John
2013-10-27 17:32:44,333 - PROGRESS   - a - How are you doing?