utils.py 文件源码

def _set_logger(self, unused=None):
        if not hasattr(logging, 'TRACE'):
            logging.TRACE = 5
            logging.addLevelName(logging.TRACE, "TRACE")
        # create a logger, we current use the regular logger but we should
        # switch to multiprocessing.get_logger if we notice trouble in, for example,
        # logging from multiple processes.
        self._logger = logging.getLogger()
        # clear previous handler
        while self._logger.hasHandlers():
            self._logger.removeHandler(self._logger.handlers[0])
        self._logger.setLevel(logging.DEBUG)
        # output to standard output
        cout = logging.StreamHandler()
        levels = {
            0: logging.ERROR,
            1: logging.WARNING,
            2: logging.INFO,
            3: logging.DEBUG,
            4: logging.TRACE,
            None: logging.INFO
        }
        #
        cout.setLevel(levels[self._verbosity])
        cout.setFormatter(ColoredFormatter('%(color_levelname)s: %(color_msg)s'))
        self._logger.addHandler(cout)
        self._logger.trace = lambda msg, *args: self._logger._log(logging.TRACE, msg, args)
        # output to a log file
        if self._logfile is not None:
            ch = logging.FileHandler(self._logfile, mode = 'a')
            # debug informaiton and time is always written to the log file
            ch.setLevel(logging.DEBUG)
            ch.setFormatter(logging.Formatter('%(asctime)s: %(levelname)s: %(message)s'))
            self._logger.addHandler(ch)
    #
    # attribute exec_dir