log.py 文件源码

def __add_options(parser):
    levels = ('TRACE', 'DEBUG', 'INFO', 'WARN', 'ERROR', 'CRITICAL')
    parser.add_argument('--log-level',
                        choices=levels, metavar="LEVEL",
                        default='INFO',
                        dest='loglevel',
                        help=('Amount of detail in build-time console messages. '
                              'LEVEL may be one of %s (default: %%(default)s).'
                              % ', '.join(levels))
    )