code: def __init__(self):
      super(ConvertCommand, self).__init__()
      self.parser = argparse.ArgumentParser()
      self.parser.add_argument("command")
      self.parser.add_argument("--module_name", "-n")
      self.parser.add_argument(
          "--module_version", "-v", nargs="?", default="1.0.0"
      )
      self.parser.add_argument("--model_dir", "-d")
      self.parser.add_argument("--output_dir", "-o")
  
file_path: PaddleHub/paddlehub/commands/convert.py
imports: import argparse
  import os
  import time
  import tarfile
  import shutil
  from string import Template
  from paddlehub.env import TMP_HOME
  from paddlehub.commands import register
  from paddlehub.utils.xarfile import XarFile
  from paddlehub.server.server import CacheUpdater
label_desc: Use image node_id 1 to create a new ConvertCommand object  with example: obj = ConvertCommand()