display.py 文件源码

def __init__(self, arg_parser):
        super(DisplayPlugin, self).__init__(arg_parser)

        def filename(fn):
            if not os.path.exists(fn):
                raise ArgumentTypeError("The file %s does not exist!" % fn)
            return fn

        pattern_group = \
            self.arg_group.add_mutually_exclusive_group(required=True)
        pattern_group.add_argument("--pattern-help", action="store_true",
                                   dest="pattern_help",
                                   help=ARGS_HELP["--pattern-help"])
        pattern_group.add_argument("-p", "--pattern", dest="pattern_string",
                                   metavar="STRING",
                                   help=ARGS_HELP["--pattern"])
        pattern_group.add_argument("-f", "--pattern-file", dest="pattern_file",
                                   metavar="FILE", type=filename,
                                   help=ARGS_HELP["--pattern-file"])
        self.arg_group.add_argument("--no-newline", action="store_true",
                                    dest="no_newline",
                                    help=ARGS_HELP["--no-newline"])

        self.__pattern = None
        self.__return_code = 0