code: def convert_to_df(self):
      index = pd.DataFrame(self.index_value, columns=[self.index_name])
      data = pd.DataFrame(self.x, columns=self.column_name)
      df = pd.concat([index, data], axis=1)
      df = df.set_index(self.index_name)
      return df
  
imports: import copy
  import numpy
  import pandas
  import scipy.sparse
  from sklearn.cluster import KMeans
  from sklearn.impute import SimpleImputer
label_desc: Use image node_id 2 for calling the InstanceWithIndex obj's underlying member method code with example usage: obj.convert_to_df() and returns: df