code: def test_squeeze(self):
      import pandas as pd
  
      file_path = os.path.join(
          self.resource_path, "orca/data/single_column.csv"
      )
      data_shard = bigdl.orca.data.pandas.read_csv(
          file_path, squeeze=True
      )
      data = data_shard.collect()
      df = data[0]
      assert isinstance(df, pd.Series)
  
imports: import os.path
  import pytest
  from unittest import TestCase
  import bigdl.orca.data
  import bigdl.orca.data.pandas
  from bigdl.orca.data import SharedValue
  from bigdl.dllib.nncontext import *
  from bigdl.orca.data.transformer import *
  from bigdl.orca import init_orca_context
label_desc: Use image node_id 21 for calling the TestSparkXShards obj's underlying member method code with example usage: obj.test_squeeze() without return types