code: def test_str_read(self):
      self.init_db()
      with contextlib.closing(dumbdbm.open(_fname, "r")) as f:
          self.assertEqual(
              f["\u00fc"], self._dict["\u00fc".encode("utf-8")]
          )
  
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 9 for calling the DumbDBMTestCase obj's underlying member method code with example usage: obj.test_str_read() without return types