Pictures are named in batches in order (change size /jpg to PNG) [tips]

explain ： The name after sorting comes from the one-to-one correspondence between the truth graph and the original graph in the segmentation test task , To calculate the segmentation effect . Standard naming （eg：000,010,200） Also for the source program sort（） Use of functions .

Use ：tot_path Write the folder address to be named in batch ,new_tot_path Write the folder address to be transferred after naming .

Be careful ：.sort() The sorting method of functions and natsorted() The sorting of functions is different , Can pass print() Check the sorting rules and make a good judgment .

import os
from PIL import Image
from glob import glob
from natsort import natsorted, ns

tot_path = ''
new_tot_path = ''
os.makedirs(new_tot_path,exist_ok=True)
# path = glob(os.path.join(tot_path,'*.jpg'))
path = os.listdir(tot_path)
path.sort()
# pat = natsorted(path, alg=ns.PATH)
i = 1
for pho in path:
        # print(pho)
        os.chdir(tot_path)
        img = Image.open('./' + pho)
        # img2 = img.resize((32 , 32))
        if i < 10:  # 0-9
                newname = "00" + str(i)
        elif i > 9 and i < 100:  # 10-100
                newname = "0" + str(i)
        elif i > 99 and i < 1000:  # 100-1000
                newname = str(i)
        img.save(new_tot_path + '/' + newname + '.png')
        i = i + 1