code: def close(self):
      super(Monitor, self).close()
      if self.f is not None:
          self.f.close()
  
imports: from gym.core import Wrapper
  import time
  from glob import glob
  import csv
  import os.path
  import json
label_desc: Use image node_id 6 for calling the Monitor obj's underlying member method code with example usage: obj.close() without return types