code: def _copy_files(self, base):
      for file in glob.glob(base + "*"):
          shutil.copy(file, self.root_directory)
  
imports: import abc
  import glob
  import logging
  import os
  import shelve
  import shutil
  import tempfile
  from datetime import datetime
  import numpy
  import tensorflow
  from .graph_partitioner import PARTITION_ALGO_REGISTRY, AbstractGraphPartitioner
label_desc: Use image node_id 2 for calling the PartitionDataManager obj's underlying member method code with example usage: obj._copy_files(base) without return types