1.5.py

import os  
from PIL import Image  
  
pathDir='F:\CloudMusic'  
os.chdir(pathDir)  

def get_imglist(): #获取照片名称list  
    img_list=[]  
    list_dir=os.listdir(pathDir)  
    for x in list_dir:  
        if '.jpg' in x:  
            img_list.append(x)  
        else:  
            print("This is not a picture: "+x)  
    return img_list  

def modify_imgsize():  
    for filename in get_imglist():      
        img=Image.open(filename)  
        if max(img.size)>1136:  
            value=max(img.size)/1136.0  
            newsize =(int(img.size[0]/value),int(img.size[1]/value)) 
            newimg = img.resize(newsize,Image.ANTIALIAS) #修改大小                 
            newimg.save('new_'+filename)  
        else:  
            print("This picture is availabe:"+filename)  
      


if __name__ == '__main__':
    modify_imgsize()