docstr: Get current position in bounding box format `(top left x, top left y,
  width, height)`.
docstr_tok: ["Get","current","position","in","bounding","box","format","`","(","top","left","x",",","top","left","y",",","width",",","height",")","`","."]
code: def tlwh(self):
      """
      Get current position in bounding box format `(top left x, top left y,
      width, height)`.
      """
      if self.mean is None:
          return self._tlwh.copy()
      ret = self.mean[:4].copy()
      ret[2] *= ret[3]
      ret[:2] -= ret[2:] / 2
      return ret
  
imports: import numpy
  from collections import deque, OrderedDict
  from ..matching import jde_matching
  from ppdet.core.workspace import register, serializable
label_desc: Use image node_id 8 for calling the STrack obj's underlying member method code with example usage: obj.tlwh() and returns: ret, self