code: def tearDown(self):
      for suffix in ["", ".pag", ".dir", ".db"]:
          os_helper.unlink(self.filename + suffix)
  
imports: from test.support import import_helper
  from test.support import os_helper
  import os
  import unittest
  import dbm.ndbm
  from dbm.ndbm import error
label_desc: Use image node_id 2 for calling the DbmTestCase obj's underlying member method code with example usage: obj.tearDown() without return types