code: def __init__(self):
      super(FairMOTLoss, self).__init__()
      self.det_weight = self.create_parameter(
          shape=[1], default_initializer=Constant(-1.85)
      )
      self.reid_weight = self.create_parameter(
          shape=[1], default_initializer=Constant(-1.05)
      )
  
file_path: PaddleDetection/ppdet/modeling/losses/fairmot_loss.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import paddle
  import paddle.nn
  from paddle.nn.initializer import Constant
  from ppdet.core.workspace import register
label_desc: Use image node_id 1 to create a new FairMOTLoss object from inherited base classes: nn with example: obj = FairMOTLoss()