code: def to_arff_row(self):
      if self.type_ == "METAFEATURE":
          value = self.value
      else:
          value = "?"
  
      return [
          self.name,
          self.type_,
          self.fold,
          self.repeat,
          value,
          self.time,
          self.comment,
      ]
  
imports: from abc import ABCMeta, abstractmethod
  import time
  from io import StringIO
  import arff
  import scipy.sparse
label_desc: Use image node_id 2 for calling the MetaFeatureValue obj's underlying member method code with example usage: obj.to_arff_row() and returns: list