code: def test_bostonhousing(self):
      hist = bostonhousing()
      min_loss = min(hist.history["val_loss"])
      print(min_loss)
      self.assertLess(min_loss, 55)
  
imports: from unittest import TestCase, main, skip
  import testenv
  import ktrain
label_desc: Use image node_id 1 for calling the TestRegression obj's underlying member method code with example usage: obj.test_bostonhousing() without return types