text: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  
  from .ctdet import CtdetTrainer
  from .ddd import DddTrainer
  from .exdet import ExdetTrainer
  from .multi_pose import MultiPoseTrainer
  from .ctseg import CtsegTrainer
  
  train_factory = {
    'exdet': ExdetTrainer, 
    'ddd': DddTrainer,
    'ctdet': CtdetTrainer,
    'multi_pose': MultiPoseTrainer, 
    'ctseg':CtsegTrainer
  }
  