code: def __init__(self, max_size=100):
      self.flag_track_interrupt = False
      self.keypoint_saver = dict()
      self.max_size = max_size
      self.id_to_pop = set()
      self.flag_to_pop = False
  
file_path: PaddleDetection/deploy/pipeline/pphuman/action_utils.py
label_desc: Use image node_id 1 to create a new KeyPointBuff object from inherited base classes: object with example: obj = KeyPointBuff(max_size)