import datetime
nowTime = datetime.datetime.now().strftime('%Y-%m-%d-%H-%M-%S') # 现在
dir = "/home/kangle/webdata/JPEGImages"
for root, dirs, file in os.walk(dir):
 for b in file:
  if os.path.join(b).split('.')[1] == 'jpg':
   os.rename(dir + os.sep + b, dir + os.sep + str(nowTime) + '_' + b)
   print (dir, b)
   shutil.copy(os.path.join(dir, str(nowTime) + '_' + b), r'/home/kangle/result')

import datetime
nowTime = datetime.datetime.now().strftime('%Y-%m-%d-%H-%M-%S') # 现在
 
dir = "/home/kangle/webdata/JPEGImages"
for root, dirs, file in os.walk(dir):
 for b in file:
  if os.path.join(b).split('.')[1] == 'jpg':
   # os.rename(dir + os.sep + b, dir + os.sep + str(nowTime) + '_' + b)
   shutil.copy(os.path.join(dir, b),os.path.join("/home/kangle/result", str(nowTime) + '_' + b))
   # shutil.copy(os.path.join(dir, str(nowTime) + '_' + b), r'/home/kangle/result')