code: def setUp(self) -> None:
      self.spark = (
          SparkSession.builder.master("local[1]")
          .config("spark.default.parallelism", "1")
          .getOrCreate()
      )
  
file_path: spark/python/pyspark/ml/torch/tests/test_data_loader.py
imports: import unittest
  import numpy
  from pyspark.ml.torch.distributor import TorchDistributor, _get_spark_partition_data_loader
  from pyspark.sql import SparkSession
  from pyspark.ml.linalg import Vectors
label_desc: Use image node_id 1 for calling the TorchDistributorDataLoaderUnitTests obj's underlying member method code with example usage: obj.setUp() without return types