code: def test_bool_not_empty(self):
      with dbm.ndbm.open(self.filename, "c") as db:
          db["a"] = "b"
          self.assertTrue(bool(db))
  
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 16 for calling the DbmTestCase obj's underlying member method code with example usage: obj.test_bool_not_empty() without return types