code: def setUpClass(cls):
      cls.data = "This is sentence1. This is sentence2! This is sentence3? This is, sentence4 with comma."
  
imports: import unittest
  import os
  import nlpaug.augmenter.sentence
label_desc: Use image node_id 1 for calling the TestRandomSentenceAug obj's underlying member method code with example usage: obj.setUpClass(cls) without return types