code: def setUpClass(cls):
      super(SparkConnectReattachTestCase, cls).setUpClass()
      # Disable the shared namespace so pyspark.sql.functions, etc point the regular
      # PySpark libraries.
      os.environ["PYSPARK_NO_NAMESPACE_SHARE"] = "1"
  
      cls.connect = (
          cls.spark
      )  # Switch Spark Connect session and regular PySpark session.
      cls.spark = PySparkSession._instantiatedSession
      assert cls.spark is not None
  
file_path: spark/python/pyspark/sql/tests/connect/client/test_reattach.py
imports: import os
  import unittest
  from pyspark.sql import SparkSession
  from pyspark.testing.connectutils import ReusedConnectTestCase
  from pyspark.testing.pandasutils import PandasOnSparkTestUtils
  from pyspark.testing.sqlutils import SQLTestUtils
  from pyspark.testing.utils import eventually
label_desc: Use image node_id 1 for calling the SparkConnectReattachTestCase obj's underlying member method code with example usage: obj.setUpClass(cls) without return types