code: def bbox_cxcywh_to_xyxy(x):
      cxcy, wh = paddle.split(x, 2, axis=-1)
      return paddle.concat([cxcy - 0.5 * wh, cxcy + 0.5 * wh], axis=-1)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import copy
  import math
  import paddle
  import paddle.nn
  import paddle.nn.functional
  from ..bbox_utils import bbox_overlaps
label_desc: Use image node_id 2 for calling a global function with example usage: bbox_cxcywh_to_xyxy(x) and returns: paddle