log.py 文件源码

def _configureLogger(name, force=False):
    try:
        logger = _Loggers[name]
    except KeyError:
        # add unknown logger names
        logger = getLogger(name)
        _debug("Added unknown logger name '%s'" % name)

    # If not forcing, skip loggers that already have handlers installed
    if not force and logger.handlers:
        return

    global _LogLevels
    if not _LogLevels:
        setLogLevels(getParam('GCAM.LogLevel') or 'WARN')

    if name in _LogLevels:
        level = _LogLevels[name]
        _debug("Configuring %s, level=%s" % (name, level))
        logger.setLevel(level)
    else:
        parent = logger.parent
        # Handle case of user plugins, which aren't in pygcam package
        # but we'd like them to default to the 'pygcam' loglevel
        if isinstance(parent, logging.RootLogger):
            parent = getLogger(PKGNAME)

        logger.setLevel(parent.level)

    logger.propagate = False

    # flush and remove all handlers
    for handler in logger.handlers:

        if not isinstance(handler, logging.NullHandler):
            handler.flush()
        logger.removeHandler(handler)

    logConsole = getParamAsBoolean('GCAM.LogConsole')
    if logConsole:
        consoleFormat = getParam('GCAM.LogConsoleFormat')
        _addHandler(logger, consoleFormat)

    logFile = getParam('GCAM.LogFile')
    if logFile:
        fileFormat = getParam('GCAM.LogFileFormat')
        _addHandler(logger, fileFormat, logFile=logFile)

    if not logger.handlers:
        logger.addHandler(logger, logging.NullHandler())
        _debug("Added NullHandler to root logger")