code: def test_dumbdbm_creation(self):
      with contextlib.closing(dumbdbm.open(_fname, "c")) as f:
          self.assertEqual(list(f.keys()), [])
          for key in self._dict:
              f[key] = self._dict[key]
          self.read_helper(f)
  
imports: import contextlib
  import io
  import operator
  import os
  import stat
  import unittest
  import dbm.dumb
  from test import support
  from test.support import os_helper
  from functools import partial
label_desc: Use image node_id 1 for calling the DumbDBMTestCase obj's underlying member method code with example usage: obj.test_dumbdbm_creation() without return types