code: def __init__(self, *args, **kwargs):
      super().__init__(*args, **kwargs)
  
imports: import unittest
  import pandas
  from evadb.expression.constant_value_expression import ConstantValueExpression
  from evadb.models.storage.batch import Batch
label_desc: Use image node_id 1 to create a new ConstantExpressionsTest object from inherited base classes: unittest with example: obj = ConstantExpressionsTest()