code: def setUp(self) -> None:
      # self.random_str = "hello world, hello scala, hello encrypt, come on UNITED!!!"
      letters = string.ascii_lowercase
      self.random_str = "".join(
          random.choice(letters) for _ in range(100)
      )
  
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 1 for calling the TestEncryption obj's underlying member method code with example usage: obj.setUp() without return types