"""A simple log mechanism styled after PEP 282.""" # This module should be kept compatible with Python 2.1. # The class here is styled after PEP 282 so that it could later be# replaced with a standard Python logging implementation. DEBUG = 1INFO = 2WARN = 3ERROR = 4FATAL = 5 import sys class Log:     def __init__(self, threshold=WARN):        self.threshold = threshold     def _log(self, level, msg, args):        if level >= self.threshold:            if not args:                # msg may contain a '%'. If args is empty,                # don't even try to string-format                print msg            else:                print msg % args            sys.stdout.flush()     def log(self, level, msg, *args):        self._log(level, msg, args)     def debug(self, msg, *args):        self._log(DEBUG, msg, args)     def info(self, msg, *args):        self._log(INFO, msg, args)     def warn(self, msg, *args):        self._log(WARN, msg, args)     def error(self, msg, *args):        self._log(ERROR, msg, args)     def fatal(self, msg, *args):        self._log(FATAL, msg, args) _global_log = Log()log = _global_log.logdebug = _global_log.debuginfo = _global_log.infowarn = _global_log.warnerror = _global_log.errorfatal = _global_log.fatal def set_threshold(level):    # return the old threshold for use from tests    old = _global_log.threshold    _global_log.threshold = level    return old def set_verbosity(v):    if v <= 0:        set_threshold(WARN)    elif v == 1:        set_threshold(INFO)    elif v >= 2:        set_threshold(DEBUG)