[随手记]python批量修改文件名称

同上，记录一些数据集处理的代码段

import os

data_path = 'train_data/ground_truth'
i = 1
for root, dirs, files in os.walk(data_path):
    for file in files:
        old_name = os.path.join(root, file)
        new_name = os.path.join(root, "IMG_{}".format(i) + ".mat")
        os.rename(old_name, new_name)
        i = i+1

顺便贴下os.walk方法：