code: def tearDown(self):
      if self.g is not None:
          self.g.close()
      unlink(filename)
  
imports: from test import support
  from test.support import import_helper, cpython_only
  import unittest
  import os
  from test.support.os_helper import TESTFN, TESTFN_NONASCII, unlink, FakePath
label_desc: Use image node_id 3 for calling the TestGdbm obj's underlying member method code with example usage: obj.tearDown() without return types