code: def area(box):
      if box.ndim == 1:
          return (box[2] - box[0] + 1.0) * (box[3] - box[1] + 1.0)
      else:
          return (box[:, 2] - box[:, 0] + 1.0) * (
              box[:, 3] - box[:, 1] + 1.0
          )
  
file_path: tensornets/tensornets/datasets/coco.py
imports: from __future__ import division
  import os
  import json
  import numpy
label_desc: Use image node_id 2 for calling a global function with example usage: area(box) and returns: unknown, unknown