code: def add_deltas(x, window=2, order=2):
      feats = [x]
      for _ in range(order):
          feats.append(delta(feats[-1], window))
      return np.concatenate(feats, axis=1)
  
imports: import numpy
label_desc: Use image node_id 2 for calling a global function with example usage: add_deltas(x, window, order) and returns: np