code: def close(self):
      self.full = True
      self.dfp.close()
      self.ifp.close()
  
imports: import binascii
  import collections
  import os
  import pickle
  from datetime import datetime
  from struct import calcsize, pack, unpack
  from pfrl.collections.random_access_queue import RandomAccessQueue
label_desc: Use image node_id 5 for calling the _ChunkWriter obj's underlying member method code with example usage: obj.close() without return types