文件夹里所有的图片调整大小-Python

import cv2
import os
def rebuild(dir):
    for root,dirs,files in os.walk(dir):
        for file in files:
            filepath=os.path.join(root,file)
            try:
                image=cv2.imread(filepath)
                dim=(227,227)
                resized=cv2.resize(image,dim)
                path="/home/mj/kaggle/retrain1/"+file
                cv2.imwrite(path,resized)
            except:
                print(filepath)
                os.remove(filepath)

dir="/home/mj/kaggle/train/"
rebuild(dir)
print("end")