Do not rely on namedtuple._asdict()

 [2020/11/20 22:33:48.824] FAIL: test_metadata (test_client.ClientUnitTest)

 [2020/11/20 22:33:48.824] ----------------------------------------------------------------------

 [2020/11/20 22:33:48.824] Traceback (most recent call last):

 [2020/11/20 22:33:48.824]   File "/data/mci/52b9e171edeb47e2aab844bb34d76fc9/src/test/test_client.py", line 296, in test_metadata

 [2020/11/20 22:33:48.824]     self.assertRaises(TypeError, DriverInfo, 'Foo', 1, 'a')

 [2020/11/20 22:33:48.824] AssertionError: TypeError not raised by DriverInfo

 [2020/11/20 22:33:48.824] ======================================================================

 [2020/11/20 22:33:48.824] FAIL: test_grid_out_custom_opts (test_custom_types.TestGridFileCustomType)

 [2020/11/20 22:33:48.824] ----------------------------------------------------------------------

 [2020/11/20 22:33:48.824] Traceback (most recent call last):

 [2020/11/20 22:33:48.824]   File "/data/mci/52b9e171edeb47e2aab844bb34d76fc9/src/test/test_custom_types.py", line 736, in test_grid_out_custom_opts

 [2020/11/20 22:33:48.824]     self.assertEqual({"foo": 'red', "bar": 'blue'}, two.metadata)

 [2020/11/20 22:33:48.824] AssertionError: {'foo': 'red', 'bar': 'blue'} != RawBSONDocument(b' \x00\x00\x00\x02foo\x0[333 chars]ne)))

 [2020/11/20 22:33:48.824] ======================================================================

 [2020/11/20 22:33:48.824] FAIL: test_grid_out_cursor_options (test_grid_file.TestGridFile)

 [2020/11/20 22:33:48.824] ----------------------------------------------------------------------

 [2020/11/20 22:33:48.824] Traceback (most recent call last):

 [2020/11/20 22:33:48.824]   File "/data/mci/52b9e171edeb47e2aab844bb34d76fc9/src/test/test_grid_file.py", line 242, in test_grid_out_cursor_options

 [2020/11/20 22:33:48.824]     self.assertEqual(cursor_dict, cursor_clone_dict)

 [2020/11/20 22:33:48.824] AssertionError: {'_Cu[35 chars]sor__exhaust_mgr': None, '_Cursor__max_await_t[1464 chars]': 0} != {'_Cu[35 chars]sor__data': deque([]), '_Cursor__hint': None, [1469 chars]None}

 [2020/11/20 22:33:48.824] Diff is 2289 characters long. Set self.maxDiff to None to see it.

 [2020/11/20 22:33:48.824] ======================================================================

 [2020/11/20 22:33:48.824] FAIL: test_json_options_with_options (test_json_util.TestJsonUtil)

 [2020/11/20 22:33:48.824] ----------------------------------------------------------------------

 [2020/11/20 22:33:48.824] Traceback (most recent call last):

 [2020/11/20 22:33:48.824]   File "/data/mci/52b9e171edeb47e2aab844bb34d76fc9/src/test/test_json_util.py", line 80, in test_json_options_with_options

 [2020/11/20 22:33:48.824]     opts3.uuid_representation, UuidRepresentation.JAVA_LEGACY)

 [2020/11/20 22:33:48.824] AssertionError: 3 != 5

$ git grep _asdict | tee

bson/codec_options.py:313:        opts = self._asdict()

bson/json_util.py:327:        opts = self._asdict()

pymongo/driver_info.py:33:        for name, value in self._asdict().items():

    def _asdict(self):

        return collections.OrderedDict(zip(self._fields, self))