model/backbone/__init__.py

from .resnet import *
from .mobilenet_v2 import *

visual_backbone_list = ['ResNet10', 'mobilenet_v2']

def get_visual_backbone(args):
    if args.visual_backbone in visual_backbone_list:
        model = eval(args.visual_backbone)()
        if hasattr(args, 'pretrain_vis_path') and args.pretrain_vis_path != "":
            model.load_model(pretrain=args.pretrain_vis_path)
            if hasattr(args, 'logger'):
                args.logger.info("Visual backbone has been loaded...")
        else:
            if hasattr(args, 'logger'):
                args.logger.info("Visual backbone choose to train from scratch")
        return model
    else:
        raise NotImplementedError("Unsupported Backbone: {}".format(args.visual_backbone))