import tensorflow as tf
from tensorflow import keras
from tensorflow.keras import layers
import os


num_skipped = 0
for folder_name in ("Cat", "Dog"):
    #os.path.join()连接两个或更多的路径名组件
    folder_path = os.path.join(".\PetImages", folder_name)
    #os.listdir(path)列出该目录下的子目录
    for fname in os.listdir(folder_path):

        fpath = os.path.join(folder_path, fname)

        try:
            #open() 函数用于打开一个文件，并返回文件对象，在对文件进行处理过程都需要使用到这个函数，如果该文件无法被打开，会抛出 OSError。
            fobj = open(fpath, mode="rb")
            is_jfif = tf.compat.as_bytes("JFIF") in fobj.peek(10)
            
        finally:
            fobj.close()

        if not is_jfif:
            num_skipped += 1
            # Delete corrupted image
            os.remove(fpath)

print("Deleted %d images" % num_skipped)