data_dir='../data' train_imgs=gdata.vision.ImageFolderDataset(os.path.join(data_dir,'hotdog/train')) test_imgs=gdata.vision.ImageFolderDataset(os.path.join(data_dir,'hotdog/test')) print(len(train_imgs),len(test_imgs))#2000,800 2000张训练图片（热狗+非热狗），800张测试图片（热狗+非热狗）