code: def _expand_one_key_dictionary(_dict):
      '''
      Returns the only one key and it's value from a dictionary.
      '''
      key = next(six.iterkeys(_dict))
      value = _dict[key]
      return key, valuf _expand_one_key_dictionary(_dict):
      '''
      Returns the only one key and it's value from a dictionary.
      '''
      key = next(six.iterkeys(_dict))
      value = _dict[key]
      return key, value
docs: Returns the only one key and it's value from a dictionary.