code: def calculate_group(
      self, data: pd.DataFrame, **kwargs
  ) -> pd.DataFrame:
      if not self.is_vectorizable:
          raise RuntimeError(
              f"Cannot apply calculate_group: operator {self.name} is not vectorizable"
          )
      else:
          raise RuntimeError(
              f"Unimplemented calculate_group for operator {self.name}"
          )
  
imports: from pydantic import BaseModel
  from typing import Dict, List, Optional, Tuple, Union
  import abc
  import pandas
  import numpy
label_desc: Use image node_id 5 for calling the PandasOperand obj's underlying member method code with example usage: obj.calculate_group(data) without return types