code: def __init__(self, forecast_size: int):
      super().__init__()
      self.forecast_size = forecast_size
  
imports: from typing import Tuple, Optional
  import numpy
  import torch
  import torch.nn
  from ..losses.pytorch import MAE
  from ..common._base_windows import BaseWindows
label_desc: Use image node_id 1 to create a new ExogenousBasis object from inherited base classes: nn with example: obj = ExogenousBasis(forecast_size)