code: def test_stack_batch_more_than_one_column_should_raise_exception(
      self,
  ):
      batch = Batch(create_dataframe_same(2))
      self.assertRaises(ValueError, Batch.stack, batch)
  
imports: import unittest
  from test.util import create_dataframe, create_dataframe_same
  import numpy
  import pandas
  from evadb.models.storage.batch import Batch
  from evadb.parser.alias import Alias
label_desc: Use image node_id 20 for calling the BatchTest obj's underlying member method code with example usage: obj.test_stack_batch_more_than_one_column_should_raise_exception() without return types