code: def evaluate(self, batch: Batch, **kwargs):
      batch = Batch(pd.DataFrame({0: [self._value] * len(batch)}))
      return batch
  
file_path: evadb/evadb/expression/constant_value_expression.py
imports: from typing import Any
  import numpy
  import pandas
  from evadb.catalog.catalog_type import ColumnType
  from evadb.expression.abstract_expression import AbstractExpression, ExpressionType
  from evadb.models.storage.batch import Batch
label_desc: Use image node_id 2 for calling the ConstantValueExpression obj's underlying member method code with example usage: obj.evaluate(batch) and returns: batch