class_docstr: Base Class for Building a model
class_docstr_tok: ["Base","Class","for","Building","a","model"]
code: def check_model_built(self):
      if self.model is None:
          raise AttributeError(
              "You are trying to perform an operation that requires the model to have been fit."
              + "However the model has not been fit yet. Please fit the model once before you try this operation."
          )
  
file_path: Auto_TS/auto_ts/models/build_base.py
imports: from typing import Optional, List
  from abc import ABC, abstractmethod
  import pandas
  from pandas.core.generic import NDFrame
label_desc: Use image node_id 5 for calling the BuildBase obj's underlying member method code with example usage: obj.check_model_built() without return types