func_code: def swap_unique_keys_values(d):
      dictionary = {}
      unique = []
      not_unique = []
      value = []
      for key in d:
          if not key in unique:
              unique.append(key)
          else:
              not_unique.append(key)
      for i in unique:
          if not unique in not_unique:
              value.append(i)
      for keys in value:
          dictionary[d[keys]] = keys
      return dictionary