【python】读取图片复制并重命名

```python
# -*- coding:utf8 -*-
import os
import argparse
import shutil
# imgpath = './img'
# new_imgpath = './new_img'
# jsonpath = './gt'
# new_jsonpath = './new_json'

# j = 0  #文件名起始
# for root, dirs, files in os.walk(imgpath):
#     for i in range(len(files)):
#         json_file = files[i].split('.')[0]
#         shutil.copy(os.path.join(imgpath,files[i]), os.path.join(new_imgpath, str(j).zfill(12) + '.jpg'))
#         shutil.copy(os.path.join(jsonpath,json_file + '.json'), os.path.join(new_jsonpath, str(j).zfill(12) + '.json'))
#         j += 1

# print ('this work has done')

parser = argparse.ArgumentParser()
parser.add_argument('--timestamp_file', type=str, default='timestamp.txt')
parser.add_argument('--image_file', type=str, default='image.txt')
parser.add_argument('--image_path', type=str, default='image')
opt = parser.parse_args()

def rename_img(time_stamp, filelist, img_path):
    #filelist = os.listdir(img_path) #获取文件路径
    total_num = len(filelist) #获取文件长度（个数）
    i = 0 #表示文件的命名是从1开始的
    for i in range(total_num):
        item = filelist[i]    # 迭代 3 次
        for n in range(3):
            if i*3 + n == len(time_stamp):
                break
            item_timestamp =  time_stamp[i*3 + n]
            n = n + 1
            shutil.copy(os.path.join(item), os.path.join(img_path, item_timestamp + '.jpg'))
            # if item.endswith('.jpg'): #初始的图片的格式为jpg格式的（或者源文件是png格式及其他格式，后面的转换格式就可以调整为自己需要的格式即可）
            #     src = os.path.join(os.path.abspath(img_path), item)
            #     dst = os.path.join(os.path.abspath(img_path), item_timestamp + '.jpg')#处理后的格式也为jpg格式的，当然这里可以改成png格式
            #     try:
            #      os.rename(src, dst)
            #      print ('converting %s to %s ...' % (src, dst))
            #     except:
            #      continue

    print ('total %d to rename & converted %d jpgs' % (total_num*3, i))
    
if __name__ == '__main__':
    classes_path = os.path.expanduser(opt.timestamp_file)
    with open(classes_path, mode='r') as f:
        class_names = f.readlines()
    class_names = [c.strip() for c in class_names]

    images_path = os.path.expanduser(opt.image_file)
    with open(images_path, mode='r') as f:
        images_names = f.readlines()
    images_names = [c.strip() for c in images_names]
    rename_img(class_names, images_names, opt.image_path)