code: def test_parse_memory(self):
      self.assertEqual(_parse_memory("1g"), 1024)
      with self.assertRaisesRegex(ValueError, "invalid format"):
          _parse_memory("2gs")
  
imports: import os
  import unittest
  from py4j.protocol import Py4JJavaError
  from pyspark import keyword_only
  from pyspark.util import _parse_memory
  from pyspark.loose_version import LooseVersion
  from pyspark.testing.utils import PySparkTestCase, eventually
  from pyspark.find_spark_home import _find_spark_home
label_desc: Use image node_id 8 for calling the UtilTests obj's underlying member method code with example usage: obj.test_parse_memory() without return types