python argparse sys.argv

python argparse sys.argv

 class WeiLearningArgumentParser(argparse.ArgumentParser):
     def __init__(self,
                  prog=None,
                  usage=None,
                  description='[CONFIG_FILE_NAME] [ID]',
                  epilog=None,
                  version=None,
                  parents=[],
                  formatter_class=argparse.HelpFormatter,
                  prefix_chars='-',
                  fromfile_prefix_chars=None,
                  argument_default=None,
                  conflict_handler='error',
                  add_help=True):
         argparse.ArgumentParser.__init__(self,
                                          prog,
                                          usage,
                                          description,
                                          epilog,
                                          version,
                                          parents,
                                          formatter_class,
                                          prefix_chars,
                                          fromfile_prefix_chars,
                                          argument_default,
                                          conflict_handler,
                                          add_help)

     def init_arguments(self):
         self.add_argument("config_file", metavar = "config_file", type= str, default='conf/weilearn.xml',
                           help= "the config_file of weilearn depends on. ")
         self.add_argument('node_id', metavar = "node_id", type=int, default= 1,
                           help= 'the id of node which start weilearn.')

     def parse_args(self, args = None):
         if args is None:
             args = sys.argv[1:]
         if len(args) < 2:
             args = ['-h']
         args = argparse.ArgumentParser.parse_args(self, args)
         return args