code: def testOrderedDict_preservesOrder(self):
      # dict iteration order is not specified prior to Python 3.7, and is
      # observably different from insertion order in CPython 2.7.
      od = collections.OrderedDict()
      for c in string.ascii_lowercase:
          od[c] = c
      self.assertEqual(len(od), 26, od)
      self.assertEqual(list(od), list(json_util.Cleanse(od)))
  
file_path: tensorboard/tensorboard/backend/json_util_test.py
imports: import collections
  import string
  from tensorboard import test
  from tensorboard.backend import json_util
label_desc: Use image node_id 7 for calling the CleanseTest obj's underlying member method code with example usage: obj.testOrderedDict_preservesOrder() without return types