code: def sub_stracks(tlista, tlistb):
      stracks = {}
      for t in tlista:
          stracks[t.track_id] = t
      for t in tlistb:
          tid = t.track_id
          if stracks.get(tid, 0):
              del stracks[tid]
      return list(stracks.values())
  
imports: import numpy
  from collections import defaultdict
  from collections import deque, OrderedDict
  from ..matching import jde_matching
label_desc: Use image node_id 2 for calling a global function with example usage: sub_stracks(tlista, tlistb) and returns: list