code: def tearDown(self):
      self.output.close()
  
imports: import csv
  import os
  import platform
  import sys
  import unittest
  from io import StringIO
  from agate import csv_py3
  from agate.exceptions import FieldSizeLimitError
label_desc: Use image node_id 2 for calling the TestDictWriter obj's underlying member method code with example usage: obj.tearDown() without return types