code: def __init__(self, model, window_shape=10, step=1):
      self.model = model
      self.window_shape = window_shape
      self.step = step
  
imports: import torch
  import numpy
  from torch.autograd import Variable
  from skimage.util import view_as_windows
label_desc: Use image node_id 1 to create a new OcclusionExplainer object  with example: obj = OcclusionExplainer(model, window_shape, step)