text: exp_name = 'darknet19_voc12trainval_exp1'
  
  pretrained_fname = 'darknet19.weights.npz'
  
  start_step = 0
  lr_decay_epochs = {60, 90}
  lr_decay = 1./10
  
  max_epoch = 160
  
  weight_decay = 0.0005
  momentum = 0.9
  init_learning_rate = 1e-3
  
  # for training yolo2
  object_scale = 5.
  noobject_scale = 1.
  class_scale = 1.
  coord_scale = 1.
  iou_thresh = 0.6
  
  # dataset
  imdb_train = 'voc_2012_trainval'
  imdb_test = 'voc_2012_test'
  batch_size = 1
  train_batch_size = 16
  