code: def setUp(self):
      self.sc = SparkContext("local[4]", "MLlib tests")
      self.spark = SparkSession(self.sc)
  
imports: import unittest
  from pyspark import SparkContext
  from pyspark.sql import SparkSession
label_desc: Use image node_id 1 for calling the MLlibTestCase obj's underlying member method code with example usage: obj.setUp() without return types