code: def add(self, n, values=[]):
      self.update(self.seen_so_far + n, values)
  
file_path: BigDL/python/dllib/src/bigdl/dllib/feature/dataset/base.py
imports: import os
  import sys
  import shutil
  import tempfile
  import time
  from distutils.dir_util import mkpath
  from six.moves.urllib.request import urlopen
  import numpy
label_desc: Use image node_id 3 for calling the Progbar obj's underlying member method code with example usage: obj.add(n, values) without return types