code: def test_aes128_cbc_bytes(self):
      enc_bytes = encrypt_bytes_with_AES_CBC(
          self.random_str.encode(), "analytics-zoo", "intel-analytics"
      )
      dec_bytes = decrypt_bytes_with_AES_CBC(
          enc_bytes, "analytics-zoo", "intel-analytics"
      )
      assert (
          dec_bytes == self.random_str.encode()
      ), "Check AES CBC 128 encryption and decryption result"
  
file_path: analytics-zoo/pyzoo/test/zoo/common/test_encryption_utils.py
imports: from unittest import TestCase
  import pytest
  import string
  import random
  from zoo.common.encryption_utils import *
label_desc: Use image node_id 2 for calling the TestEncryption obj's underlying member method code with example usage: obj.test_aes128_cbc_bytes() without return types