from ..common.optim import SGD as optimizer from ..common.coco_schedule import lr_multiplier_1x as lr_multiplier from ..common.data.coco import dataloader from ..common.models.retinanet import model from ..common.train import train dataloader.train.mapper.use_instance_mask = False model.backbone.bottom_up.freeze_at = 2 optimizer.lr = 0.01