code: def test_squeeze(self):
      import pandas as pd
  
      file_path = os.path.join(
          self.resource_path, "orca/data/single_column.csv"
      )
      data_shard = zoo.orca.data.pandas.read_csv(
          file_path, squeeze=True
      )
      data = data_shard.collect()
      df = data[0]
      assert isinstance(df, pd.Series)
  
imports: import tempfile
  import os.path
  import pytest
  from unittest import TestCase
  import shutil
  import zoo.orca.data
  import zoo.orca.data.pandas
  from zoo.orca import OrcaContext
  from zoo.common.nncontext import *
  from zoo.orca.data.image import write_tfrecord, read_tfrecord
label_desc: Use image node_id 5 for calling the TestSparkBackend obj's underlying member method code with example usage: obj.test_squeeze() without return types