你又打错字了……初始化数据目录的时候你少打了一个/
data_dir = 'E:\datasets\cats_vs_dogs'
train_cats_dir = data_dir + '/train/cats'
train_dogs_dir = data_dir + '/train/dogs'
test_cats_dir = data_dir + '/valid/cats'
test_dogs_dir = data_dir + '/valid/dogs'
应该是
data_dir = 'E:\datasets\cats_vs_dogs'
train_cats_dir = data_dir + '/train/cats/'
train_dogs_dir = data_dir + '/train/dogs/'
test_cats_dir = data_dir + '/valid/cats/'
test_dogs_dir = data_dir + '/valid/dogs/'
你这个代码运行的时候，会报出大量的形如
2020-06-14 13:27:38.031283: W tensorflow/core/framework/op_kernel.cc:1655] OP_REQUIRES failed at whole_file_read_ops.cc:116 : Not found: NewRandomAccessFile failed to Create/Open: C:\datasets\cats_vs_dogs/train/catscat.0.jpg : 系统找不到指定的文件。
的错误，很明显C:\datasets\cats_vs_dogs/train/catscat.0.jpg这种路径就有问题，应该是很容易定位到问题的。