PipeTool.py 文件源码

def __init__(self, description):
        CmdLineTool.__init__(self, description)

        self.argParser.add_argument('-f', '--file', nargs='?',
                                    type = FileType('r'), default=sys.stdin,
                                    help='read input from the provided file')

        self.argParser.add_argument('-o', '--out', nargs='?', type=
                                    FileType('w'), default=sys.stdout,
                                    help = 'write output to provided file')