code: def xywh2xyxy(box):
      x, y, w, h = box
      x1 = x - w * 0.5
      y1 = y - h * 0.5
      x2 = x + w * 0.5
      y2 = y + h * 0.5
      return [x1, y1, x2, y2]
  
imports: import math
  import paddle
  import numpy
label_desc: Use image node_id 11 for calling a global function with example usage: xywh2xyxy(box) and returns: list