title: python error :the following arguments are required
body: <p>i am new to work with python and i want to run this code , but get this error.</p>
  
  <p>code:</p>
  
  <pre><code>import argparse
  import os
  import sys
  BASE_DIR = os.path.dirname(os.path.abspath(__file__))
  ROOT_DIR = os.path.dirname(BASE_DIR)
  sys.path.append(BASE_DIR)
  from model import *
  import indoor3d_util
  parser = argparse.ArgumentParser()
  parser.add_argument('--gpu', type=int, default=0, help='GPU to use [default: GPU 0]')
  parser.add_argument('--batch_size', type=int, default=1, help='Batch Size    during training [default: 1]')
  parser.add_argument('--num_point', type=int, default=4096, help='Point number [default: 4096]')
  parser.add_argument('--model_path', required=True, help='model checkpoint file path')
  parser.add_argument('--dump_dir', required=True, help='dump folder path')
  parser.add_argument('--output_filelist', required=True, help='TXT filename, filelist, each line is an output for a room')
  parser.add_argument('--room_data_filelist', required=True, help='TXT filename, filelist, each line is a test room data label file.')
  parser.add_argument('--no_clutter', action='store_true', help='If true, donot count the clutter class')
  parser.add_argument('--visu', action='store_true', help='Whether to output OBJ file for prediction visualization.')
  FLAGS = parser.parse_args()
  </code></pre>
  
  <p>what should i do?
  error :</p>
  
  <pre><code>batch_test.py: error: the following arguments are required: --model_path, --dump_dir, --output_filelist, --room_data_filelist
  </code></pre>