code: def test_amazon_office(self):
      random.seed(time.time())
      if random.random() > 0.8:
          ratings = office.load_feedback()
          contexts = office.load_graph()
          self.assertEqual(len(ratings), 53282)
          self.assertEqual(len(contexts), 108466)
  
imports: import unittest
  import random
  import time
  from cornac.datasets import amazon_office
label_desc: Use image node_id 1 for calling the TestAmazonOffice obj's underlying member method code with example usage: obj.test_amazon_office() without return types