Question

我想做我认为很简单的事情。

Actually with the python logging module, I am interested logging everything on the command line at the level given from the command line arguments, and log to file to a fixed DEBUG level.

Creating two different loggers with different levels doesn t work, but setting the levels of two different handlers both added to the root logger doesn t work either, so any idea about how I should actually do it? (reading on other links the second approach should work, so am I doing something else stupid?)

这是目前建立我的伐木系统的法典:

class LoggerSetup(object):
    """Setup the different logger objects
    """

    def __init__(self):
        self.root_logger = logging.getLogger()
        self.shell_hdlr = logging.StreamHandler()

    #TODO: add another logging handler which stores to a temporary file
    #which should be cleaned up later
    def setup_shell_logger(self, log_level):
        self.root_logger.setLevel(LOG_LEVELS[log_level])
        # in this way the root logger is not set but the handlers are set
        self.shell_hdlr = logging.StreamHandler()
        self.shell_hdlr.setLevel(LOG_LEVELS[log_level])
        self.shell_hdlr.setFormatter(StarFormatter())
        #FIXME: add the support for regular expression exclusion too
        self.root_logger.addHandler(self.shell_hdlr)

    def setup_log_include(self, log_include):
        """Set up the filter to include log messages
        """
        if log_include:
            incl = FilterInclude(log_include)
            self.shell_hdlr.addFilter(incl)

    def setup_log_exclude(self, log_exclude):
        """Set up the filters to exclude log messages
        """
        if log_exclude:
            excl = FilterExclude(log_exclude)
            self.shell_hdlr.addFilter(excl)

    def setup_file_logging(self):
        """Set up the file logger, which always logs in DEBUG mode
        even if the top level logger is set to another level
        """
        #XXX: not working, one possible way to make it work is to create
        #only one log, and different handler/filters to make to handle all
        #the different outputs
        file_handler = logging.FileHandler(LOG_FILENAME)
        # the file logging is always in debug mode
        file_handler.setLevel(logging.DEBUG)
        formatter = logging.Formatter( %(name)-12s: %(levelname)-8s %(message)s - %(asctime)s )
        file_handler.setFormatter(formatter)
        self.root_logger.addHandler(file_handler)

Answer 1

This is something I m using with all of my Python command-line apps. It s a little verbose, but you should be able to get a logger that accepts an optional argument to create a console logger at any level, irrespective of what s being logged to the file:

#!/usr/bin/env python
import logging
from argparse import ArgumentParser

COMPANY_LOGGER =  COMPANY.Python.Logger 
CONSL_LEVEL_RANGE = range(0, 51)
LOG_FILE =  company.log 
FORMAT_STR =  %(asctime)s %(levelname)s %(message)s 

parser = ArgumentParser()
parser.add_argument( -c ,  --console-log , metavar= ARG ,
                    type=int, choices=range(0, 51),
                    action= store , dest= console_log ,
                    default=None,
                    help= Adds a console logger for the level specified in the range 1..50 )

args = parser.parse_args()

# Create logger
logger = logging.getLogger(COMPANY_LOGGER)
logger.setLevel(logging.DEBUG)
formatter = logging.Formatter(FORMAT_STR)

# Add FileHandler and only log WARNING and higher
fh = logging.FileHandler(LOG_FILE)
fh.name =  File Logger 
fh.level = logging.WARNING
fh.formatter = formatter
logger.addHandler(fh)

# Add optional ConsoleHandler
if args.console_log:
    ch = logging.StreamHandler()
    ch.name =  Console Logger 
    ch.level = args.console_log
    ch.formatter = formatter
    logger.addHandler(ch)

logger.debug( DEBUG )
logger.info( INFO )
logger.warning( WARNING )
logger.critical( CRITICAL )

从指挥线开始,我们就可以看到gged积层的差异。

-c1 equates to “DEBUG and high” (the most verbose), but corporate. 伐木率仍然高于伐木:

~ zacharyyoung$ ./so.py -c1
2012-01-12 08:59:50,086 DEBUG DEBUG
2012-01-12 08:59:50,086 INFO INFO
2012-01-12 08:59:50,087 WARNING WARNING
2012-01-12 08:59:50,087 CRITICAL CRITICAL

~ zacharyyoung$ cat company.log 
2012-01-12 08:59:50,087 WARNING WARNING
2012-01-12 08:59:50,087 CRITICAL CRITICAL

e 等同于INFO:

~ zacharyyoung$ ./so.py -c20
2012-01-12 09:00:09,393 INFO INFO
2012-01-12 09:00:09,393 WARNING WARNING
2012-01-12 09:00:09,393 CRITICAL CRITICAL

~ zacharyyoung$ cat company.log 
2012-01-12 08:59:50,087 WARNING WARNING
2012-01-12 08:59:50,087 CRITICAL CRITICAL
2012-01-12 09:00:09,393 WARNING WARNING
2012-01-12 09:00:09,393 CRITICAL CRITICAL

友情链接