old_contents: import unittest
  from paas_manager.hadoop_modules import start_hadoop, exec_hadoop
  
  
  class Test_hadoop_modules(unittest.TestCase):
      def test_start_hadoop(self):
          jar_path = ""
          args = []
  
          def callback(out, err):
              print(out)
              print(err)
  
          t = start_hadoop(jar_path, args, callback)
  
          t.join()
  
      def test_exec_hadoop(self):
          mock_path = "test/mock_exec_hadoop.sh"
  
          def callback(out, err):
              self.assertEqual(out, "fin\n")
              self.assertEqual(err, "err\n")
  
          command = [mock_path]
          exec_hadoop(command, callback)
  
  if __name__ == '__main__':
      unittest.main()
  
new_contents: import unittest
  from paas_manager.hadoop_modules import start_hadoop, exec_hadoop
  
  
  class Test_hadoop_modules(unittest.TestCase):
      def test_start_hadoop(self):
          jar_path = ""
          args = []
  
          def callback(out, err):
              print("stdout: " + out)
              print("stderr: " + err)
  
          t = start_hadoop(jar_path, args, callback)
  
          t.join()
  
      def test_exec_hadoop(self):
          mock_path = "test/mock_exec_hadoop.sh"
  
          def callback(out, err):
              self.assertEqual(out, "fin\n")
              self.assertEqual(err, "err\n")
  
          command = [mock_path]
          exec_hadoop(command, callback)
  
  if __name__ == '__main__':
      unittest.main()
  
subject: Fix print